Bratty sister 6: Secrets revealed and a runaway ballbuster

Staring at the staircase, having just cum all over my sister's friend's tank top, I stood, petrified, as I heard a loud knock on an upstairs door and a bright, cheerful voice ring out. 

"Natalie! It's Chloe! I need to borrow a tank top. Your brother shot his cum *all over me!*"

My heart sank as I heard these words. While Nat had double-teamed my balls with our aunt, she didn't know about Chloe having her way with me. *Is this going to make her mad? She nearly destroys my nuts on a daily basis when she's HAPPY!* As my body started to shake with both excitement and fear, I heard my sister's door slam open and her angry voice ring throughout the house.

"He did what?!" she screamed, walking out of her room to inspect the tight-fitting shirt in question. "Oh my god, he fucking came *all over you!* She walked to the staircase and started her descent, stomping her feet with each step. "What the hell are you doing cumming all over Chloe's chest, you *pervert*?!  

As the angry young woman strode up to me, she fiercely grabbed my still-swollen balls through my shorts, using both of her hands to clamp down on my throbbing nuts. Chloe ran after her, her tight tank top still covered with cum, and put her hands on Nat's shoulders from behind. 

"Natalie, it's OK! I just helped him because his cock was hard!"

Nat stared at my face, and I noticed tears starting to form in her eyes. She turned to the well-developed blonde behind her and, with a sniffle, shouted her grievances.  

"That's *my* job! *I'm* the one that cracks his nuts! He's *my* brother!"

She turned to me, tears now falling down her freckled cheeks.

"B-But Nat," I stammered. "Aunt Jess busted them, and you didn't seem mad then. What's this-"

\*Wham!\*

"Agh, fuck!"

As she continued to cry, Nat launched her knee into my balls, nearly lifting me off the ground and causing me to fall into her. She held me up with her body as she continued to drive her knee up into my throbbing balls over and over. My hands wrapped around her lower back, and I pulled her close, bringing my mouth to her ear.

"Nat, my balls! My *balls*!

After the 6th knee, the petite young woman let go of me, and I crumbled to the ground, hands grabbing my battered balls.  Nat turned to her blonde friend, screaming as she pointed at me collapsed on the floor.

"It was different with Aunt Jess! We busted his balls *together*, and it was really fun."  She turned back to me. "But just letting any random girl have her way with your balls..." She started to sniffle again as she rubbed her eyes. "I don't like that!"

As my sister continued to cry, I forced myself to stand, hands still desperately clinging to my aching balls. I hobbled over to the crying woman, resting my head on her shoulder as I whispered in her ear. 

"I'm sorry, Nat. I didn't know it would upset you." As I tried to comfort her, I started pulling my shorts down, exposing my still-limp dick and steadily-swelling balls. "You're right, I've been bad. You can punish my balls if it makes you feel better."

Nat quickly looked up at me, surprise in her eyes. "Wha-"

Before she could say anything, I grabbed her right hand and quickly moved it to my naked balls, leaning in closer and whispered in her ear again.

"You can punish my balls, Nat. I've been bad, right? Crack my nuts, sister."

Nat slowly brought her free hand to meet its pair, and wrapped both around my throbbing balls. As she started to apply that familiar pressure to my most vulnerable place, I could hear her breathing start to get heavier. *She likes it. If I let her bust my balls, It'll make her feel better.* I looked down to see that, draped over her steadily-working hands, my dick was starting to get hard. *And it'll be a reward for me, too.*

As my little sister continued to roughly handle my balls, I looked up from her to see the well-endowed Chloe leaning on the wall by the staircase, her cum-stained tank top draped over the railing and her big, juicy tits barely contained by her laced bra. I made a sharp inhale as I saw her, and she turned to me, a devilish grin appearing on her face. With both hands, she quickly grabbed the bottom of each cup and, in one fluid motion, flipped her bra up, exposing her massive tits for me. Seeing her massive breasts sag slightly into their natural resting position and her bright, pink, hard nipples, my cock shot up to its full erect length in a matter of seconds. My sister looked up into my eyes, the tears previously on her face replaced with a faint, embarrassed blush.

"Hehe," she giggled, moving closer until her modest breasts squished into my trembling chest. "You really need me after all, don't you? No one can keep this big cock under control like you little sister, can they?"

Nat continued to apply pressure on my balls as if she were trying to squeeze the life out of them. Seeing my cute little sister mangle my nuts and her busty friend flashing her tits, my dick started to throb so hard it was hurting. I leaned in close to her again, whispering so that only she could hear.

"Kick them."

"Ahh..."

"Nat, kick my balls." I backed away from her, giving ample room for her leg to make its deadly arc. "Kick my balls. Teach my cock a lesson. I *need* you to do it."

As my entire body trembled from excitement, my breathing became ragged. I grabbed my hard dick with both hands, pulling it up and holding it against my stomach to provide a clear path for my sister's prizes. She looked down at my balls, excitement clear in her eyes.

"I'm..." she stammered between excited breaths. "I'm gunna kick those balls! I'm gunna teach that big, thick cock a lesson!"

The petite young woman pulled her right leg back and quickly launched it up into my balls, crushing them up against my pelvis and causing me to crumble. On my way to the ground, she caught me, forcing me back up and sending another kick toward her targets. As she delivered blow after blow, the quiet house was suddenly filled with the loud clapping sounds of her silk-soft feet meeting my naked, swollen balls. After a few kicks, she let me fall to the floor as her hands darted to her own crotch. I looked up from the ground, holding my balls, to see my sister frantically rubbing her pussy through her short shorts.

"Ohhh, Ah! Your balls! I kicked your balls! That big, throbbing cock is never gunna work again!" Ahhh! Ooohhh!!"

As my sister neared her climax, I looked over at Chloe, who was still showing her tits off to me. I took a second to stare at her bright pink nipples before looking up at her face. She gave me a knowing smile, and as she gave me a nod, I could tell exactly what she was thinking. *What a good big brother.* Chloe turned to look at Nat, and watching the petite girl frantically rub between her legs, the blonde woman's eyes slowly went wide as she had a sudden epiphany. As she opened her mouth to talk, I was a split second too late to stop her from saying something that could not be taken back.

"Wow, Natalie! I didn't know you *liked* smashing his balls! I thought you were just keeping his cock under control, but it really turns you on, doesn't it?"

Nat went silent, her hands darting up to cover her mouth and her legs trembling as her wet pussy screamed for more stimulation. She turned to Chloe and then to me, tears again filling her eyes. 

"No! NO! I just kick his balls because it's fun and to keep that cock under control! I don't like it, I don't..." As her voice trailed off, she looked down to see an obvious wet spot on the crotch of her short shorts. She covered the spot with her hands, turning again to me, unable to stop the tears. "I-I..."

Unable to handle the situation anymore, the young, petite, soaking-wet woman ran up the stairs, slamming the door shut once reaching the safety of her room. My gaze turned to the half-naked Chloe, who, after taking a second to process what had just happened, started walking toward me. 

"Chloe, I didn't-"

"You jerk, what did you do?!"

Chloe picked her foot up off the ground, bringing her knee up to her chest before slamming it town on my swollen balls. I bucked my hips and slammed the back of my head on the ground, my entire body reeling from the massive impact of her foot. Though my balls were on fire and my dick was throbbing, I could not take my eyes off her massive, naked tits. Chloe continued to stomp on my balls, her breasts bouncing with each wind up and impact. After the fourth stomp, I couldn't contain myself anymore, and with my eyes glued on her ever-bouncing tits, I grabbed my hard dick and started to stroke up and down its length.

"Seriously?!" she spat, looking down at my frantically moving hand. "Your sister is up there *crying*, and you're down here playing with your hard cock?! I should castrate you right now!"

"B-But, it's *your* fault she's upset!" I retorted, my hand still stroking my dick and my eyes still glued to her tits. "She didn't want us to know that she liked it!"

With one final stomp, Chloe stopped her assault on my nuts, squatting down to reach eye-level with me and letting out a big sigh. 

"Jeez, numbnuts! You should have said something earlier! I could have really scrambled those eggs!"

*You didn't even give me a chance to say anything, you big-titted, ballbusting bitch!*

Chloe followed my gaze to see that I was still staring at her exposed tits, and then looked further south to see that I was still playing with my dick.

"Jeez, alright. Let's get rid of that hard, throbbing cock, and *then* we'll go take care of Natalie."

Chloe leaned forward, gently placing her right knee on top of my swollen ball sack before steadily leaning into me, increasing the pressure and flattening my balls into the floor. My left hand shot up, roughly grabbing her right breast and fondling it with fervor, and I furiously ran my hand up and down my dick. As I felt myself nearing the end, I craned my head back and moaned, causing Chloe to lean further forward and putting even more pressure on my ever-flattening balls. My left hand concentrated on her bright pink nipple, squeezing it and gently tugging on it, causing the busty blonde to let out an erotic moan and sending me over the edge. As I came, I bucked my hips as best I could with my throbbing balls still trapped under her knee, and I came all over stomach and crotch. As my orgasm faded, I fell back onto the floor, head swimming as the blonde removed her knee from my balls and stood up.

"There," she said, doing her best to wipe the copious amount of cum off her stomach. "Let's go get your sister, now!"

I stood up, nearly toppling over as I tried to catch my balance, and started heading toward the staircase when I heard my sister's door slam open and feet stomping down the stairs. Nat had changed into a clean T-shirt and miniskirt and had a backpack on. She quickly walked past us and to the front door. As she opened the door, she turned to us, blushing deeply as the embarrassment from her secret being exposed had not yet faded. 

"I-I..."

"Nat wait!" I interrupted, seeing the tears again forming in her eyes. "Let's talk about this!"

"I'm moving out!"

*What?...*

Chloe and I stood there, staring at that petite young woman in the doorway. I took a step forward, reaching my hand out to try and stop her.

"Nat, wait! Please-"

\*Smack!\*

"Ahh, fuck!"

As I had reached out to grab her hand, my little sister had swung her own in an underhand trajectory to roughly slap my naked balls up into my pelvis, causing me to bend over and desperately hold my bruised nuts in an effort to get the pain to recede. *This is serious. I can't think about getting off to this right now!* I looked up at Nat to see that the hand that had slapped my nuts had darted down to her own crotch. Realizing where her hand had involuntarily ended up, my sister's face turned an even deeper shade of red as she turned toward the door. 

"I'm moving out! I'm *serious!*"

Nat ran out the door, running down the sidewalk and out of my sight. I tried to hobble after her, but Chloe's hand grabbing my shoulder stopped me in my tracks. 

"Wait! Your cock is out! Put some pants on first!"

Looking down to see that she was right, I ran over to the couch to quickly put on my shorts, hitting my balls with my own hand as I too-quickly tried to pull them up.

"Jeez!" Chloe yelled as she was putting her bra back on. "I know you like it, but there will be plenty of time to get your balls busted *after* we find Natalie!"

"I know, I know! It wasn't on purpose!"

I ran to the door and looked in the direction that Nat had run. My eyes scanning the horizon, I felt my heart sink as I realized that I'd lost sight of her. Dejected, I turned and walked back into the house, plopping onto the couch with an exasperated sigh. 

"What is it? Why aren't you going after her?" Chloe asked, sitting next to me and putting her hand on my leg in an effort to comfort me.

"I don't know which way she went, and if I just run around blindly, It'll cause more harm than good." I lowered my head and slumped down into the couch. "Damnit!"

Chloe gently rubbed my back, then got up. She picked up her cum-stained tank top and headed for the door, putting it on inside out as to try to hide the very obvious stains. "Let's just give her some time." she said, stepping out the door and then turning to face me again. "Things will work out. I know they will." 

Chloe gave me a friendly smile, a far cry from the devilish little ballbusting grin I was used to. As she closed the door, I collapsed into the couch. *I hope she's okay. I hope she won't be this upset forever.* These anxious thoughts swam through my head as I curled up on the couch. Turning my head up to the front door, I found myself panicking at the thought that she may never come home. I closed my eyes, trying to drown out the negative thoughts, instead remembering all the mornings my sister's adorable giggles, cute annoyed faces, and bright, beautiful smiles as she had cracked my nuts over the past few days. I sat up, a fire of determination growing in the pit of my stomach.

*Tomorrow, I'm gunna find her! I'm bringing my bratty little sister home!*