Aleisha Tests Out Her Brother’s New Cup

~~My first attempt at BB fiction. If this is popular, I plan on a sequel.~~

Link to Part 2 [here](https://www.reddit.com/r/BallbustingStories/comments/zy0cut/aleisha_tests_out_her_brothers_new_cup_part_2/).

**Disclaimer: All characters in this story over 18 years of age.**

“No Aleisha! We’re not going to do THAT!” snapped Brad at his cheeky little sister.

“Awww come on! Why not? It’ll be fun! Are you afraid I’ll hurt your little ballsies too much?” she replied, slyly grinning at her big brother standing there looking absolutely bewildered that his younger sister would ever suggest such an idea.

“Okay first of all, they’re not little, alright?” countered Brad. “And how would you know anyway?” he said as he tried to regain some authority over Aleisha.

“Ummm, I’ve seen you naked before Brad. You and that… dangling nutsack of yours,” Aleisha chuckled to herself, enjoying how defensive Brad was getting about the size of his manhood.

“You’re so immature Aleisha, just shut up okay? Forget the whole idea.” Brad was still more nervous than he wanted to admit after Aleisha had so casually suggested that she should “test out” his new athletic cup and make sure it was, in her words “good enough for the field”, by booting him in the balls and seeing if it provided enough protection for his delicate orbs.

“Hey! There’s no need to get so aggressive Brad, I was trying to help you out, you know?” Aleisha stood there doing her best puppy-eyed expression to her brother, feigning some sympathy and innocence. Her slender, petite frame, straight blonde locks and bright blue eyes certainly went along way to her getting herself out of trouble anytime her big brother was enraged at her.

Brad softened his stance and glanced her up and down, noticing her tight, black spandex shorts and cute, little white crop top that hugged her surprisingly large breasts for such a small frame. He felt himself stir with a deeply suppressed arousal for a moment before snapping back to the present, clearing his throat and trying to sound masculine again.

“Oh, so my sister is looking out for me by bringing up the idea of kicking me in the balls? What are you talking about Aleisha?” Brad could feel his heart racing just talking about this. It scratched that part of his mind that was highly aroused by the taboo nature of it all.

“Yes, actually… because if you take a big hit on the football field and this cup of yours is a dud, then, well… it might be bye bye ballsies for good! I mean, think about that… those things are very sensitive and fragile Brad, it doesn’t take much…”

Aleisha’s run-down of the male anatomy was interrupted by her brother, “Yes, I’m well aware, thanks. But taking unnecessary nut shots is not a medically-sound way of judging the quality of a cup for God’s sake.”

Brad could see his sister was displaying a playful boldness that she normally didn’t show, as soon as he had brought home his new cup and she had caught a glimpse of it in his room.

Aleisha relished the opportunity to poke fun at her brother and secretly enjoyed how uncomfortable her interest in the family jewels had made him. Something about him being so afraid of his little sister reminding him of his vulnerability was making her savor this role reversal and power trip for all it’s worth.

“Okay, okay… how about this? I’ll just kick you once, alright? I promise it won’t be a hard one and I won’t even wear shoes or anything? If you feel a light kick then we’ll definitely know the cup is no good and you need another one.” Aleisha proposed, hoping her brother would take the bait.

“Aleisha… why are you so concerned with my balls? This is weird.” Brad said tensely.

Aleisha shot her brother another doe-eyed look and pleaded, “Because… you’re my big brother and you looked out for me. I wanna make sure my big bro doesn’t take any punishment on the football field that could have been avoided. Sheesh, sorry for being such a caring sister.”

Her considerate tone, though completely fake, resonated with Brad and made him feel as if her intentions really were genuine and good, even if the way she proposed “helping him” was a bit off-putting.

“After all, you’re like 6’2 and twice my weight. I’m sure you’ll survive one kick to the testicles from little me” Aleisha smiled and giggled.

Brad’s defences were neutralized with her adorable yet feisty pitch and he agreed.

“Al-alright then. But only ONE kick! And you have to do some practice kicks first before you hit me for real, so I can get an idea of how hard you’re kicking, okay?” Brad stammered back, still in disbelief he had succumbed to his bratty sister’s demands to nail him in the nuts.

“Awwww, thanks Brad!” Aleisha excitedly ran up to him and hugged him. She squeezed him a lot tighter than she normally would and Brad felt her soft breasts pressed against his body for longer than he really needed in that situation. His manhood swelled even though he knew it shouldn’t; his body’s confused way of responding to the bizarre tension of the situation.

“Hmmm… okay, now spread your legs.” Aleisha instantly got serious and ordered her brother into position.

Brad’s mouth dried instantly and he stammered back, “Wha-hey, okay wait. Hold on. Ummm, let me go put the cup on first, jeez!”

“Oh of course, sorry. Haha, I was about ready to punt your unprotected nutsack! That would have been a little too realistic of a practice run.” Aleisha continued laughing as Brad shook his head, turned and went to his closet to retrieve his cup. His mind racing, unable to stop thinking about how unbelievably audacious his little sister was being, which was only sending a further rush of arousal throughout his body.

Brad took a deep breath and came back to Aleisha with the cup.

“Well… put it on then.” Aleisha directed him, as if this was completely normal for a little sister to do to her brother, almost as if she had done it before.

“Err, I need to take off my underwear.” Brad stuttered out.

“So just go ahead and do it, I won’t look. Here…” Aleisha spun around and put her hands over her eyes like she was waiting for a surprise.

“Hurry up Brad!” she demanded, sounding like a real ballbuster, much to her brother’s continued shock.

“Okay! Okay!” Brad dropped his shorts and then his boxers, acting so very nervous as he had never willingly changed or gotten naked in front of his sister before. Though perhaps that was the least confronting part of this whole situation Brad thought, as his eyes fixated on Aleisha’s body again, this time on her ample ass which stuck out so prominently in those black spandex shorts. “How is she so… stacked but so slim?” Brad mused to himself as he stared at those round, pert butt cheeks just a few feet away from him. He hadn’t ever really noticed before, or at least tried not to notice, but his sister’s body was a sight to behold and it was making things even more difficult for him in the present.

Brad slipped his cup on and made sure his manhood was well within the confines of the hard plastic shell. His erection, still showing no signs of subsiding, he had tucked upward and somehow managed to cram into the cup as well, though it was pressing very uncomfortably against the walls of the plastic shell.

Brad pulled his shorts up, groaned and told Aleisha to turn around.

“Are you ready Brad?” Aleisha adjusted her tight shorts, ran her hands over her legs and thighs suggestively and stretched one of her legs back slightly, almost in a kicking position and cracked a sly little grin.

Brad swallowed hard and replied “Ugh, I guess so. As ready as I’ll…”

“Wait!” Aleisha stopped him mid-sentence. “You should take those shorts off so I can see what I’m kicking more clearly. They’re too baggy, I might miss!”

“What? Why?” Brad lost the ability to form sentences as Aleisha commanded again, “Brad, just take them off, it’ll be much easier that way. Trust me. And relax, I’m not going to see anything anyway.”

Almost without hesitation, Brad dropped his shorts again and threw them aside.

Aleisha giggled and pointed at the protruding bulge of the plastic shell of the cup. Thankfully it hid Brad’s raging hard-on from his sister as the plastic was completely rigid and opaque, but even he had to admit the exaggerated size of the cup made his manhood look enormous. He glanced down at his package, feeling very self-conscious standing in front of his sister like this.

“Whoa Brad! Calm down boy…” Aleisha laughed to herself, taking every opportunity to tease and humiliate her brother. “I said I was going to KICK your balls… I don’t know what you heard.” She narrowed her eyes at Brad and bit her lower lip, undeniably feeling the sexual tension in the air.

“Uh, no that’s um… just the way the cup is shaped. That’s not umm, you know…” Brad was really struggling not to sound flustered as all hell right now.

“Hehe, yeah Brad. Sure it’s the cup.” Aleisha teased. “Alright, time to put that thing to the test big bro!”

“Ugh,” Brad sighed deeply, having completely resigned himself to his fate. “Remember… a few practice kicks first” he stuttered out.

“Yeah, yeah I know. Now spread ‘em!” Aleisha shot back, her eyes widening as they fixated on her targets nestled between Brad’s legs.

Brad assumed a wide-open stance and at this distance, with no shorts on, he knew his sister couldn’t miss. Even as petite and physically unimposing as she was, she was light and fast and Brad really hoped she would show him mercy.

“Practice kick one!” Aleisha defiantly announced before swinging her leg right at her brother’s crotch, stopping just short of the cup and making a light tap with her toes against it.

“Oh God!” Brad shuddered and recoiled backwards.

Aleisha burst out laughing, her brother’s genuine look of horror and surprise on his face and his silly exclamation, making her endlessly amused as well as feeling incredibly in control of her awkward, frightened brother.

“Oh my God, you boys and your balls! You’re so dramatic about protecting those things…” she stepped back, grinning at Brad who had no idea how to respond.

Brad took a deep breath, “it’s just… it’s been a while since I got hit the balls and I forget how painful it is.”

“Aww don’t worry yourself Brad. I’m sure this cup is up to the job of protecting those little ballsies…” she couldn’t resist teasing him again and Brad was too nervous now to try and reassert his dominance over Aleisha. His fantasy of being the big, strong protective older brother had evaporated in an instant.

Now Aleisha was calling the shots, literally.

“Next one!” she announced again and flung her right foot in the direction of his gonads. Her accuracy was uncanny and this time, she made more contact with the cup than Brad expected.

**WHUMP**

A dull thud emanated from Aleisha’s foot hitting the shell of the cup and Brad’s delicate orbs shifted around inside slightly, trying to find room to readjust themselves.

“Ooof!” Brad felt a slight dull ache and stepped back for a second.

Aleisha’s eyes widened and she looked Brad over and asked excitedly, “Did I get you?” barely able to contain the rush of empowerment she felt as she tested the waters and edged closer to emasculating her older brother.

“Umm, yeah but… that didn’t hurt actually. It was just... that you caught me by surprise. Besides, you said you were doing a practice kick!” Brad tried to compose himself and reached down to readjust the cup.

“Yeah it was silly. What are you doing?” she quizzed her brother as he moved his cup back into position.

“Nothing. I just… I’m making sure the cup is still holding my balls in place.”

Aleisha laughed again. “Whatever… you boys and those balls of yours.” Aleisha fixed her shorts again, drawing Brad’s eyes to her tempting thighs and the very visible outline of her camel toe sticking out against the front of her Spandex shorts.

Brad quickly looked up at Aleisha and hoped she didn’t notice him staring. She had obviously caught him but let it slide, as knowing she was able to distract her brother and make him frustrated just made her crave this experience even more.

Unfortunately for Brad, this time he was setting himself up for a very rude awakening as his big erection was pushing the cup upwards too far and thus the hard edge of the bottom of the shell was now actually resting on his testicles. Unbeknownst to Brad, as his mind was elsewhere and he was too worried about his cock breaking free from the confines of the cup, he forgot to position his balls correctly.

“Ready or not Braaaaad…” Aleisha was getting impatient now and was she craving that feeling of totally smashing Brad’s balls with a really good kick more than anything else. Even she was slightly nervous now as she wasn’t quite sure how good of a kicker she was but after a little hesitation, she threw caution to the wind and sent her foot flying with malicious intent into Brad’s testicles.

Brad felt this one.

**THUMP**

“OOOOHHHH FUCK!” Brad yelled out so loud that Aleisha was worried someone might have heard that.

With amazing foresight, Aleisha’s foot had landed right on the base of the cup, slamming that hard plastic edge firmly into Brad’s testicles and pinning them hard against his pelvis. There was nowhere for them to go and much to her surprise, Aleisha was indeed a very good kicker.

Brad immediately collapsed to the ground groaning loudly, holding his nuts in the fetal position while occasionally stuttering out a few words of utter disbelief at what had just happened.

Aleisha looked down at him while Brad strained out “AHHH MY BALLS! WHAT… WHY? FUCK!”

Aleisha couldn’t conceal her smile and it took a lot to control her laughter as well.

“OH GOD, YOU KICKED MY BALLS SO HARD!” Brad sounded genuinely angry, so Aleisha once again attempted to defuse things with her trademark soft-spoken innocent girl act.

“Oops! Wow, I think I might have kicked too hard Brad!” Aleisha let slip a little chuckle at the end.

“AHHHHH… Aleisha my balls really hurt! Oh fuck!” Brad couldn’t even register any anger at his sister’s amusement at the situation as his poor orbs were now on fire.

Aleisha knelt down next to Brad, feigning concern and pleaded with him, “Brad, look at me. I’m so sorry, I didn’t think it would hurt so much. Oh gosh, I’ve really injured them haven’t I?”

Aleisha placed a hand on Brad’s shoulder and rubbed his arm.

Brad’s erection, though quickly-deflated by the impact of the kick, now stirred to life again at his sister’s kind words and gentle touch.

Brad struggled to speak, “No… it’s my fault, ugh. The cup was… sitting too high. I uh, didn’t adjust it properly and… it ended up crushing my balls.” He groaned again.

Aleisha’s excitement at the thought of her foot having crushed her big brother’s balls was beginning to have an effect on her and her tone became sultry and seductive, “Brad, that was honestly a really hard kick. I’m worried I might have done some damage or something? I heard sometimes if a guy is kicked too hard in the balls it can really mess up their junk, you know?”

Brad rolled onto his back and looked up at Aleisha’s sweet face just above him. It was a sight for sore eyes and now his renewed erection was uncomfortably pressing against his cup once more.

“I’ll… I’ll be… okay” Brad muttered. Aleisha was once again able to instantly turn up her feminine charm and sex appeal to make her brother forgive her, despite the fact that she had just pulverized his nuts.

She leaned over him, now giving Brad a great view of her sizable tits in that tight crop top, just a few inches from his face.

“Come on… let me check you out and make sure everything’s… still good down there?” Aleisha smiled at Brad with a genuinely compassionate look on her face.

Brad was in shock but somehow, in his current state he was too stunned and delirious with pain to really register the gravity of what she had said.

“Really?” was all Brad could say.

“Hey, it’s what little sisters are for right?” Aleisha patted his head and then continued “Come on, slide your cup off and let me just check okay?”

Brad was pretty sure he had never been this hard in his life.

Taking a brutal kick right to the balls from his newly-assertive and effortlessly sexy little sister who was now kneeling next to him and asking if she could inspect his manhood.

Brad tried to protest with “B-but, Aleisha… wait, this is…” but given his state, he was in no condition to resist Aleisha’s advances.

“Ssshh” Aleisha replied. “I’ll be quick and I promise… no jokes or childish insults.” She sounded so sincere and once again, Brad gave into his little sister’s demands, if for no other reason than at least it might distract him from the unbearable pain in his balls.

Aleisha grabbed the waistband of the jock strap that held the cup against Brad’s body. She pursed her lips together seductively and wondered what she would find beneath the bulge. With a few gentle tugs, she slid the waistband down and then freed Brad’s manhood from the confines of its cage.

Aleisha gasped and Brad’s eyes widened in shock.

“Um… okay.” Aleisha’s breathing quivered, finding Brad’s cock almost at full attention and standing completely upright.

His balls were loose and resting on the carpet of his bedroom, clearly looking redder-than-usual and slightly swollen.

Aleisha regained her composure and looked back at Brad, “Hmmm… looks like there’s some swelling here. Did I get you in one ball or both?” she continued, feeling once again completely in control of her older brother.

Brad could barely comprehend how nonchalantly his sister had exposed his manhood and was now questioning him about the effects of the kick she had just delivered. It sent his mind spinning.

“Uh… both of them.” Brad replied.

“Aleisha…. please be gentle.” He added, still slightly uneasy about allowing his sister to literally grab him by the balls, his voice clearly breathless as his cock was now fully erect and his arousal clearly visible to his sister.

Aleisha paused for a moment then reached down for his swollen nuts, saying “Let me just hold them. I’ll make sure I can’t feel anything unusual in your… scrotum.” Her small hands gently cupped his aching ballsack and wrapped themselves around his tender orbs.

Brad’s pain and suffering was finally subsiding, only because his penis was becoming so unbearably hard.

“Umm… I’m really sorry about that.” Brad stuttered.

“Oh that’s okay Brad. I know you guys can’t control it sometimes.” Aleisha pretended to be understanding but she knew full well her brother was unbelievably turned on by her and the idea of her busting his nuts mercilessly.

She rolled his testes around in her hands, checking for any signs of serious damage.

“Phew, I think you’re okay. It doesn’t feel like I broke anything or gave you any permanent damage…” Aleisha’s voice fluttered again, the idea of breaking her brother’s balls making her shiver with excitement.

As Aleisha explored her brother’s balls, her hand accidentally bumped her brother’s raging erection causing it to twitch and spasm, as it was clearly in desperate need of attention.

Brad was in a sexually-charged daze and his sister’s touch on his cock and balls was becoming way too much to bear.

“Ugh… Aleisha… umm…” Brad tried to get her attention but Aleisha noticed instantly what he was referring to.

The head of his penis was purple now and Aleisha gasped, looking visibly startled.

“Oh wow. Umm… Brad, you’re getting really, really hard now” announcing her observation as if it was news to Brad.

Brad moaned and shifted his hips to scoot a little closer to her.

Aleisha instinctively knew what her brother wanted and she reached her hand around the base of his shaft, in a moment that sent Brad into a complete meltdown.

Her other hand cupped his testicles that she had moments ago battered and bruised and she reassured her brother again, “Okay, just hold on Brad. Let me um… fix that for you, okay? Just relax and concentrate on the feeling…”

Brad thought he had seen and heard it all today but finding out his sister was actually incredibly skilled at stroking his cock was absolutely not something that he saw coming.

Aleisha skilfully pumped his cock up and down and worked her hand in a twisting motion around the head. Brad had no idea where she picked up those skills from but he didn’t care now.

He was about to erupt like a volcano.

“Ohhhhh, oooooh Aleisha…” he moaned.

It didn’t take too long for Aleisha to bring Brad to the edge. Her talented hands and gentle cupping of his balls, along with her tight ass in those spandex shorts and those big boobs of hers was just too much for him to handle.

Ropes of thick cum spurted out of Brad’s cock and Aleisha continued pumping him without pause, only exclaiming “Oh wow!” briefly while watching in shock as Brad emptied his balls all over his legs, stomach and Aleisha’s hands and forearms.

It was quite a mess and Aleisha finally released his cock and balls once the final dribble oozed out while examining all of the sticky seed coating her now.

“Brad!” she yelled. “Did you have to make such a huge mess?”

Brad heaved and sighed, unable to formulate speech.

“Oh you got some on my nice shorts too!” she said, mildly annoyed.

“You better be careful… you wouldn’t want to make your little sister angry now…” she looked back at Brad, with an evil grin.

Brad piped up and apologized for cumming on her shorts.

“That’s okay.” Aleisha replied. “Do you feel better now? Did I make the pain go away?” she questioned, again feigning genuine concern and sympathy with her mesmerizing bright blue eyes.

“Uhhhh… definitely. You’re um… you’re really… I don’t know how to thank you Aleisha”. His sister smiled at him wickedly and replied, “Oh I’ll think of a way big brother”.

Aleisha stood up, again ordering her brother “Okay now get up and clean yourself up. Mom and dad will be home soon.”

She stood over Brad, looking at his lustful and hypnotized expression, and at that moment knew she had her brother completely in the palm of her hand, literally and metaphorically.

“Brad…” Aleisha continued, “can this be our little secret?”

Brad instantly replied “Yes Aleisha. Of course. I won’t tell anyone.”

“Good boy. I’m going to take a shower. Once you… regain your senses, we can talk about it some more, okay?” she giggled.

“Uh yeah… sure” Brad mindlessly complied with his little sister, completely killing any illusion of being the older sibling in charge anymore. Brad had no clue what bold new ideas Aleisha had in store for him and his balls.