Her pussy throbbing with anticipation, she tiptoes into the bathroom, hoping for a quick, quiet release. She spreads her legs, fingers plunging into her tight, wet hole. She's so close, her breath hitching, eyes rolling back, when suddenly, the door creaks open. Panicked, she freezes, vibrator still buzzing against her clit. Her brother walks in, towels in hand, oblivious to her predicament. She's left teetering on the edge, orgasm denied, body aching for release, as she quickly hides her evidence and tries to compose herself.