As Emma watched her step brother's cock throb and leak mere inches from her pretty face, she began to question the choices she had made leading up to this critical moment in her young life. Her eyes widened as she watched his large, hairless balls swing between his legs, the sight making her body feel warm, and her breath quicken.

XXX

Nineteen years old, bookish and shy, Emma was pretty enough, petite with pale skin and mousy brown hair that framed a symmetrical face. She had firm little breasts and a tight round ass. She probably could have had more than a few boyfriends by now if not for one small problem. She was painfully shy…

It had all started when Emma had confided she was nervous for her next life drawing class. While the other students had seemed excited when the tutor had promised them a male model for their next session, Emma had panicked. The truth was, she had never seen a man naked right in front of her before. What if she couldn't concentrate? What if she fainted? Even worse, what if she threw up?

So when Jason offered to let her make a few practice sketches of him, just to calm her nerves, she had reluctantly accepted. She wondered now if it had just been a ruse to be a perv in front of her, like something out of those nasty videos he always turned off if she came into his room too quickly, a mistake she had long since stopped making. He seemed to take an inordinate amount of delight stripping off in front of her, hopping up on her bed and kneeling in front of her.

Once Emma's immediate shock at the size, and proximity of her step brother's penis had passed, she'd managed to start working.

XXX

Emma chewed on the end of her pencil before returning it to the paper. She had had to start her sketch over when she hadn't left enough room on the first sheet or paper she'd used. This time she was doing better, she felt she'd captured its general shape and size. She moved on to his testicles, lightly sketching their outlines as two spherical orbs.

She frowned and then scrubbed away his balls with her eraser. They weren't actually round, not like she'd imagined, more ovalized. They also dangled a lot lower than she had expected, maybe a result of the heat in the house. They were big, pink and totally smooth. She wondered for a moment if he shaved them. They looked like they would both just about fit in one of her palms.

She tried to start over, to capture their strange shape and size, but was distracted when a long strand of goo began to leak from his penis.

“Does it always do that?” She asked innocently, waving her pencil towards his member.

“Only when I get to show off for you, sis.” Jason laughed, wiggling his hips as a long string of precum dripped down onto her clean sheets, staining the pretty pink covers.

“Umm… okay. You don't need to make this weirder than it already is, Jason.”

Jason slowly thrust his hips forward, his manhood inches from her nose as she tried to concentrate on finishing her sketch.

“Don't be shy, sis. You can touch it if you want to.”

She knew she shouldn't. But she was struggling to really capture his dangly balls. Emma loved her art class and knew she might have to put aside her awkward relationship with the male body if she was ever to have a chance at success.

Jason closed his eyes as her small left hand reached for him, his mind reeling with anticipation. He shuddered when her fingers grazed the underside of his shaft. He bucked his hips again, completely exposing himself to her.

Emma gently cupped his balls, marveling at the weight. They felt like eggs, soft and delicate as they rested on her small palm. She lifted them slightly, admiring their form, if not their function. This was actually helpful, she knew she'd be able to better commit them to art if she understood their weight, their heft, their delicate beauty.

“Be careful, sis!” Jason groaned, his eyes now open, his handsome face looking down at her. Emma broke his gaze and looked at her outstretched hand, realizing suddenly that she'd been unconsciously squeezing his balls, rolling them in her palm as she sought to explore them.

“Please be quiet, Jason.” Emma said sternly, an uncharacteristic confidence underlining her words as she firmly massaged his throbbing balls.

She understood suddenly. This is what people meant when they said they had someone by the balls. Metaphor or not, she realized the power she wielded. No wonder men were so protective of their crotches when playing sports or horsing around with each other on the campus.

Strange how those inhibitions disappeared when they wanted a girl to touch them there. Emma instinctively knew she could do some real damage to Jason if she wanted to. His size, his strength, meant nothing when she held him like this.

“Please, sis,” Jason whined, his usually deep voice breaking a couple of octaves higher than usual, “you're squeezing too hard.”

“Don't be silly,” Emma replied, his fingers clamped around his fragile nuts, “I'm barely squeezing at all!”

Jason groaned, moving his hands to break her grip, then immediately stopping as he felt her little fingertips dig into his big balls. This wasn't what he had wanted. He has expected Emma to at least give him a clumsy hand job when she saw how much of a stud he was. Now his big nuts, freshly shaved for her, were being squeezed like a pair of lemons.

“Fuck, why I am I still so hard?”

Emma smiled up at him.

“Because you're enjoying this, bro.”

He seemed so silly now, the idea of being nervous around something so laughable as a big cock and a swinging set of balls was absurd. Like many women before her, As she cruelly squeezed his balls, Emma realized that men were not the stronger sex, not when their most delicate organs were hanging defenseless out in the open. What was even worse, was that any man could be convinced to put his entire world in her hands with nothing more than a smile and a touch.

“Emma please,” Jason begged, the excitement of his nasty little step-sister fantasy having completely evaporated as his body shuddered in agony, “you're going to crush them!”

“Do you think so, bro?” Emma giggled, mocking his earlier bravado, “Do you think my little hand could burst your balls?”

Jason groaned, fear in his eyes. Regardless, his hips continued to gently buck, his rock hard cock throbbing despite the assault on his soft babymakers below. She wouldn't really do it, would she? Damage him beyond repair? The thought terrified him, but somewhere, deep down, he felt excitement. His dick kept throbbing and shame mixed with fear in his eyes as he felt his orgasm build.

“Maybe I won't crush them,” Emma relented, “but I think I will teach you a little lesson, something to remind you that step-sisters are off limits to nasty boys like you.”

Unaware of his impending eruption, Emma dropped her pencil from her right hand and balled it into a fist. With no warning she punched him hard, her knuckles crunching into his trapped testicles with a loud clap

“Oh god, no!” Jason screamed, as Emma finally released him. Before he could even think of cupping at his aching balls his cock began to erupt, long ropes of cum jetting out to land on the sketchbook in Emma’s lap.

“Looks more like a Jackson Pollock now, bro!” Emma giggled, looking at the thick cream splattered all over her sketchbook.

Jason didn't reply. Instead he curled into a tight little ball in the middle of her bed, whimpering quietly like a spanked puppy as he softly clutched his tortured nuts.

The End.