Putting little step-bro in his place: Part 3

Part 2 is here: https://www.reddit.com/r/BallbustingStories/s/uu97UbLTq8

“Hey sis.” Zach stood gingerly at the doorway to Tracy’s room. “What” she said, busy with homework from the college course she was taking. “My girlfriend is coming over later” he said. “Whatever dude” Tracy answered. “I’m busy. Leave me alone.”

“I was wondering if I could cum tonight.” Tracy couldn’t help but laugh a little. She had almost forgotten about their agreement. “Well since you are asking nicely, I might be open to that” she said. “Come over here.” Zach walked over. “I’ll be honest, I’m surprised you’re asking” she said. “Well we were planning on doing it here, I thought you might notice” Zach said.

“When’s the last time you nutted bro?” Tracy asked. “Since you made me last week” Zach said sheepishly. “I’ve been saving my load for her.” “Well that’s a good boy then. But given my experience with you, you aren’t going to last long are you?” Tracy asked. “I can usually go for round two” Zach answered, his face red.

“So you want permission to cum twice? That’s a big ask bro. Why don’t you drop them pants and let’s see if we can work something out. It’s gonna have to cost you something” Tracy said.

“Aww come on sis” Zach said. Despite all that had happened Zach was still embarrassed about his step-sister seeing his manhood. “No complaining bro. Drop them” Tracy said. Zach dutifully stripped off his clothes, his junk on full display right in front of Tracy’s face as she was sitting down in front of him.

“You cold bro? Or are your nuts hiding from me?” Tracy couldn’t help but laugh. Zach’s sack was so tight and small. She wondered if his nuts were even outside his body. “Let’s see if I can coax them suckers out.”

“Please don’t bust my balls sis-I need them tonight” Zach begged. “I’ll be careful bro. I just want to play with them” she answered. Tracy grabbed the loose skin at the base of Zach’s cock and began tugging downwards. Zach couldn’t help but moan as his sister manipulated his ballsack. Her warm hands did the trick, and before long his nuts sagged low, the two meaty orbs resting low on his thighs, nestled within the loose skin of his scrotum.

Zach flinched as Tracy grabbed his right testicle, gave it a playful squeeze, and pulled it out away from his body. “How’s this little one been doing?” She asked. “It hurt like a bitch for a few days, but I think it’s okay” Zach answered.

Tracy turned to her little brother’s left nut. “I don’t think this one got enough attention last time” she said, squeezing the ball hard between her fingers. “Ahhh-fuck-sis-my nut!” Zach groaned, his knees buckling as his sister bore down on his testicle.

Tracy eased up for a second. “Tell you what bro, if I can have your first load your girlfriend can have your second.” “Aww sis please don’t make me cum” Zach pleaded. “You wanna bang her tonight or no?” Tracy asked, yanking down on her brother’s sack. “Ow-yes please.” “Okay then. I get one, she gets the other. Not like she’s getting in pleasure out of it when you cum in one pump anyways” she said laughing.

Tracy turned her attention back to her brother’s nuts. She explored each testicle intimately, rolling the orbs between her fingers, watching his face contort as she applied pressure to his heavy balls. Zach’s cock began to grow, his little pink nub expanding to almost 7 inches. He was definitely a grower.

Zach’s legs quivered as her pink fingernails grazed the underside of his sack. She rested her little brother’s huge balls in the palm of her hand, weighing his nuts, cupping his manhood. She chuckled at how her little brother’s babymakers could fit in her small, soft hand, despite their size.

Tracy closed her hand, crushing his balls within her grip. “Ow my balls!” Zach shrieked. She squeezed her brother’s nuts even harder. “Sis seriously-don’t bust my balls” Zach groaned. His legs started to give way, but Tracy held him up by his nuts. “Oh fuck-they’re gonna pop!” Zach cried in agony.

Tracy just laughed and finally relented, easing up on her grip just a bit. Zach’s cock was still hard as ever, precum leaking from the tip. “How do you still have a boner after all that bro? God you’re so horny.”

She grazed the underside of her little brother’s thick cock with her index finger. Zach shuddered and moaned. “Ahh sis I’m close.” She slapped his balls, smirking as his dangling bits jiggled and he groaned in pain. “Not quite yet” she said.

Tracy gripped the back of her brother’s hard cock and rubbed her thumb around in circles just below his pink tip. Zach squirmed in ecstasy. “Oh Fuck-I’m cumming!” He exclaimed breathlessly. She let go of his cock and placed her hand behind his sack. She punched him in the balls, his nuts flattening between her fist and the palm of her other hand just as the first rope of cum exploded from Zach’s cock.

“Oh my nuts!” Zach groaned as he collapsed onto his back on the floor, clutching his family jewels as his throbbing cock continued pumping out his load, each spurt coating his stomach and chest with his cum.

Tracy got up and pinched her brother’s pink nipple between her toes, laughing as his cock jumped and managed to unleash another spurt of white gooey man-juice. Her brother’s long, thick cock looked almost comical against his skinny frame, still leaking his spunk as it poked out between his hands which still held his aching nuts.

Tracy kicked his hands away and grazed his ballsack with her toe. Zach flinched. “Please sis-no more-my balls can’t take it” he begged. Her little brother’s smooth, hairless babymakers had come to rest on the hardwood floor in a large heap, sagging low after his ejaculation.

Tracy stomped on her brother’s right testicle with her bare foot, flattening it against the hard floor. “Fuck sis-I think you just popped my nut!” Zach groaned in defeat.

“Nah bro, it still feels firm to me” Tracy said, taking her foot off Zach’s ball, which appeared to still retain its large, oval shape. “Go nut in your girlfriend tonight if you still can” she said laughing, walking away and leaving her brother to nurse his busted balls.