Steven looked at his dashboard clock for the 10th time that minute. He’d agreed to give his sister a ride from her self-defense class only if she promised to get out on time; Professor Wexler was a stickler for punctuality. But as usual, Kaitlin was late. He sighed in frustration; this was just like her. She was probably just inside chatting with her friends while he was waiting for her.
He couldn’t take it anymore. He slammed his car door behind him and headed into the gym. Sure enough, she was in a corner with a two of her friends, Amy and June, of her friends from the class, giggling like they’d just heard the funniest joke. Steven couldn’t help but notice all three of the girl’s toned bodies beneath their form fitting gym wear. June’s nipples poked through her tight teal v-neck. And Amy’s black yoga pants seemed painted on, perfectly outlining her crotch in a sumptuous cameltoe.
At least there was one perk to being his sister’s temporary chauffeur. He shifted his stance awkwardly as his cock started to stiffen.
Her eye caught his, and she grinned. “Steven! Come over here, I want to show you something. Our lesson today was super interesting.”
“Kaitlin, I don’t have time for this. You know my final’s in an hour, and campus is in the opposite direction of home.”
“Just come over here, it’ll only take a second.”
He reluctantly walked up to the gaggle of girls, who for some reason all seemed to be wearing poorly hidden smirks.
“Fine, I’m here. What do you-”
Kaitlin put her hands on his shoulders, and before he could push her away, she drove her knee up into his crotch with a meaty whump. Her two friends, Amy and June, cackled with glee as she sent two more blows rocketing into his shorts, crushing his unprotected ballsack painfully. Before he could fall over, she backed up a bit, pulled her leg back, and delivered a final full-power kick, hitting her target with perfect accuracy and pinning his left nut painfully against his pelvis.
Steven coughed, then bent over, then fell to his knees, hands between his legs. His eyes started to water, and he felt like he was going to throw up. She’d hit him in the nuts enough times before for him to be familiar with the eye-watering effectives of a blow to the manhood, but she’d never had the precision and strength she did.
“Guess what we learned to-day.” She asked in a mocking singsong. He tried to say something, but no words came out.
“Groin hits!” Amy and June.
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