My Sister's Not Home

Tyler Nixon's sprawled out on the couch, thumbing through his phone like it's the only thing keeping him alive, when the doorbell buzzes. He drags himself up and swings the door open to find Elsa Jean standing there, backpack hooked over one shoulder. The girl's got that nervous buzz going—her crush on him isn't exactly under wraps, has been simmering forever. She bounces on her toes, blurting out a super energetic 'hey!' But Tyler? He barely glances up from his screen, tossing back a lazy 'hi' like she's background noise. She powers through anyway, gushing about how great it is to see him, how she's pumped for the next slumber party at their place, even slipping in that she digs his cologne. All he gives her are grunts—'uh huh,' 'ok'—short and sweet, zero effort. Finally, she throws in the towel on cracking his shell and peeks past him through the open door. 'Um... is Steph around?' she asks, voice wobbling a bit. Nope, Tyler mutters. His sister's out. Elsa's face drops like a stone. Steph swore she'd help with homework today! 'Sorry,' he smirks, a sly edge to it, 'guess she bailed. Ditched you to visit Mom upstate—staying the whole weekend.' Elsa's screwed, plain and simple. 'Oh no!' she whines, totally bummed. 'But my certification's Monday! Who the hell am I gonna get to help practice on short notice?' Tyler just shrugs, all 'beats me,' but damn, her genuine upset tugs at him a little. 'What's this even for, anyway?' he asks. Elsa spills it: she's in this physiotherapy class for extra credit, needs to nail some massage moves. Tyler perks up inside but keeps it chill. 'Hey, if it scores me a free rubdown, count me in.' Her eyes light up like fireworks—'Thanks for being such a sweetheart!' He waves her in. They head to the swanky bathroom with its big tiled floor. Elsa's puffing up this rubber mattress, then digs into her backpack, laying out her gear while Tyler leans in the doorway, eyeing it all. 'Why the tiles? And what's with the arsenal? Thought this was just a basic massage.' She grins shyly. 'Nailed the standards already. This one's tricky—NURU massage. All about body-to-body sliding. Can't exactly rope in my folks for that; way too awkward. Steph was my safe bet.' She hesitates, then adds, 'Oh, and it uses this special NURU gel. Gotta strip to underwear so it doesn't wreck your clothes.' Tyler's eyebrow shoots up—sketchy?—but he already committed. Backing out now? Total dick move. So he shrugs and peels off his shirt, then pants. Elsa chimes in, 'I should ditch mine too, y'know, in case I slip around. Gets messy slippery.' Down to undies, she flips open her notebook for the step-by-step guide and walks him through it. Starts innocent enough: slather on the gel, light rubs, nothing steamy. But minutes in, during the body-on-body part, their underwear's chafing like hell as she glides over him. 'You sure this is right?' Tyler grunts. 'Not exactly zen.' Elsa checks her notes—oh crap. 'Wait, we misread! Supposed to be buck naked for this!' Tyler's thrown. 'What kinda shady rub is this?' She pouts, cheeks pink. 'The course said practice making clients comfy stripping if they want, but I didn't catch it was mandatory. Explains why it's 18-plus only. My bad—should've double-checked. If you're weirded out, we stop.' He mulls it over. They've come this far; quitting now's just lame. So they both shuck the undies, fully bare, and pick up where they left off. Tyler can't help it—the slick, skin-on-skin grind gets him rock hard, despite his best efforts. When Elsa nudges him to flip onto his back, bam, his stiff cock's right there, impossible to hide. She blushes hard. 'I'll... ignore that,' she mumbles, and they keep going. But Tyler taps out after a bit. 'Sorry, I just... can't. This thing's got a mind of its own. Maybe I duck to my room, jerk one out quick, then finish the massage?' Elsa bites her lip. 'If you want, I could handle it for you.' He hesitates—'Awkward, you're my sister's bestie'—but she doesn't flinch, just trails a teasing rub along his shaft. He winces, lust hitting like a freight train. 'Fine, as long as Steph never hears a whisper... what the hell.'