It was already a quarter past 9 and Kevin Clarke was beginning to wonder if Keeley was ever going to come out of her room to study. It's not that he wasn't used to his twin sister spending all her spare time in her room; if anything, he wondered what she spent all her time in there doing that kept her so preoccupied. It amused Kevin how much he and his sister would conform to a lot of stereotypes about twins, or siblings in general, if only some of their traits were swapped. Keeley was one of the most popular girls in school and, as much as Kevin hated to admit it, one of the most beautiful. She was 5'1", with an hourglass figure; a winning, natural, unforced smile; big, brown, saucer-like eyes; long, reddish-brown hair done in pigtails that made her look younger than her 18 years; and 32D breasts that always seemed on the verge of bursting out of her school uniform. She was a cheerleader and was friends with everyone, and while Kevin was probably the only guy at school who didn't want to sleep with her, recently she spent nearly all her free time cooped up in her room. Kevin, meanwhile, was a lanky, gawky, socially awkward bookworm with only a couple good friends, but even he had managed to land himself a girlfriend, and a very pretty one, too.
The twins were both seniors at Heatherton Academy, one of the most prestigious private schools in the United States. All the students lived in dorms on campus, but Keeley and Kevin shared one of the nicer ones, with a bedroom for each of them, a sizeable living room and kitchen area, and their own bathroom. The few scholarship kids aside, pretty much everyone going to Heatherton had parents who were rich; some were just richer.
Kevin didn't need to study, but his sister certainly did. Kevin didn't mind helping her, but he did mind having his time wasted, and he was starting to wonder if she was ever going to come out of her room so they could get to work. Finally Kevin got up from his desk and marched out from his room to Keeley's. He opened the door and froze in the doorway—right there, before his very eyes, was his own sister, lying naked on her bed, masturbating. She was oblivious to the intrusion, so caught up in what she was doing. Instinctually Kevin started to turn away, but like driving past a car wreck he couldn't help turning back around and watching. This was better than any car wreck, though. Kevin knew objectively his sister was beautiful, but actually seeing her lying on her back, her knees clenched together in the air and the muscles in her thighs and calves taut as she jammed her big pink vibrator between her naked pussy lips, was something beyond words. Her toes curled and clutched at the sheets beneath her and she squeezed one of her puffy, pierced nipples with her free hand. Keeley's freckled face grew red and flushed as her breathing grew heavier. Her breathing turned to moans, louder and more erratic, as her wrist flicked the vibrating toy in and out of her slit at an accelerating rate.
For a moment Kevin forgot that the beautiful young girl pleasuring herself before him was his sister and he wanted nothing more than to throw himself on top of her and finish the job. The moment passed quickly as common sense kicked in and Kevin found himself having another great realization: he would never again have a better opportunity to torment his sister than the one laying supine before him at this very moment. He grinned to himself in the doorway, careful not to make a sound and alert his masturbating sister to his presence. He waited patiently, as she mashed her large tits to her chest and fucked herself furiously with the plastic toy, as her moans escalated into a breathy series of "oh! Oh! Oh! OH! OH! OH"'s and right at the moment Keeley brought herself to her crescendo, Kevin burst forward into the room.
"Jesus, Keeley!" he exclaimed in a voice that mimicked shock but was totally calculated. "What are you doing?" Kevin's intrusion so startled his sister that she shoved the vibrator inside her a little harder and deeper than she'd intended to, and in doing so hit the sweet spot.
"KEVIN!" she ejaculated, her voice an uneasy mixture of horror and ecstasy, and as she pulled the toy out she squirted her juices in an arc so far across the room that Kevin had to step backwards as it splashed at his feet. "GET OUT!" she screamed, but she was so lost in the throes of her volcanic orgasm that she couldn't stop stabbing herself with her plastic pink prick. With every removal of the vibrator she sprayed another jet of fluid across the room, every replacement of the toy a brief staunching of the unstoppable flow before the next eruption. Kevin watched, hypnotized, as his sister irrigated her bed and floor like a lawn sprinkler; if this was what all Keeley's orgasms were like, he thought, he no longer wondered why she spent so much time locked up in her room, and why every boy at school was so desperate to fuck her.
"Kevin! Kevin! Kevin," Keeley exclaimed over and over between sharp intakes of breath. Kevin figured she was trying to tell him to get out, but her cries sounded a lot like the way one cries their lover's name during sex. Keeley bit her lower lip and tears stained her cheeks as full-body spasms wracked her petite frame. Kevin stopped counting the minutes that passed before his sister's pleasure finally subsided; when it did she curled up on her side in the fetal position. Kevin knew he'd gone too far when he heard his sister sobbing into her pillow.
"Keeley?" he asked, worried. She didn't acknowledge him or even move; she just kept holding herself and crying.
Kevin closed her door behind him and went back to his room. He sat down at his desk and thought about what had just happened. He thought he knew his relationship with his sister well enough to know how to walk up to the line without crossing it. They weren't shy when it came to talking about sex with one another; Kevin figured she'd be embarrassed by his little stunt, but not traumatized by it. He never wanted that. He loved her too much for that.
An hour passed and Kevin hadn't heard a single sound or movement from his sister's room. He got up and walked back to her closed door and knocked gently. Nothing.
"Keeley?" he asked.
"Go away!" he heard her through the door, half-hearted and exhausted from crying.
"Keeley, I'm sorry."
"I don't care," she mumbled from inside.
"I didn't mean to hurt you," Kevin pleaded. "I just meant it to be a stupid gag—a very, very stupid gag by your stupid, idiot brother."
No response. If Keeley didn't affirm that, yes, her brother was a stupid idiot, then Kevin knew he really fucked up.
"I'm coming in," Kevin announced. When Keeley didn't respond, Kevin figured it was safe to enter. The lights were off and the room was dim. Kevin stepped inside and felt wetness at his feet—the carpet was damp from the puddle made by his sister's projectile ejaculations. Kevin tried to step around it but it covered a sizeable portion of the floor. Finally he made wet steps to Keeley's bedside, where she lay curled up in the same spot as when he left her, only now with the covers pulled tight like a cocoon over her body. Kevin sat down on the edge of her bed at her feet. She still didn't acknowledge him.
"Keeley, the last thing I'd ever want to do is hurt you," Kevin began. "We play pranks on each other all the time, and I horribly, horribly misjudged this one. I'm an idiot, but I'm an idiot who loves you. Please don't hate me. Let's just forget this ever happened."
"Right, like you're going to forget that," she protested through the sheets she clutched tightly around her body.
"I can try," Kevin said, and then he just couldn't help himself by testing the waters. "Admittedly, that might be difficult." Kevin felt waves of relief rush over him as he felt his sister kick him feebly from under her covers. It was playful—she was going to forgive him. He couldn't help but chuckle.
"Shut up," she croaked. "It's not fair."
"What's not?"
"I just gave you the show of a lifetime, and all I'm gonna get is an apology."
"What are you saying?" Kevin wasn't sure he liked where this was going.
"I'm saying it's your turn," Keeley replied, dead serious. Kevin still felt so guilty about what he'd done that, under the circumstances, it didn't seem like such an unreasonable request.
"Okay," Kevin gulped as he reached for the waistline to his sweatpants to pull them down.
"Jesus!" Keeley exclaimed, kicking him harder through the covers. "I was fucking kidding!"
"Right," Kevin said, relieved.
"For such an egghead sometimes you can be really dense, you know that?"
"No, but that's why I have you: to point it out," Kevin smiled sheepishly. Keeley didn't respond for some time, like she was processing how she wanted to take things.
"Dork," Keeley finally smiled in return.
"Hug?"
"I can't."
"You don't forgive me that much?"
"I haven't moved in an hour," Keeley rolled her eyes. "I'm still naked under here, dumbass."
