The shower curtain billows as siblings, bound by blood and secrecy, step into the steamy cubicle together. Their bodies press close, hearts pounding in sync as they try to ignore the elephant in the room. But the hot water and the scent of soap can't mask the arousal that's building between them. Alex's hand accidentally brushes against Jamie's cock, sending a jolt through them both. Jamie bites his lip, trying to suppress a moan as he feels his sister's body respond in kind. They stand there, frozen, as the water cascades over them, the unsaid hanging heavy in the air.