Allen Swift casually enters the room, his noticeable erection straining against his jeans. Claire Roos, his blonde-haired sister, can't help but notice. With a sly smile, she approaches him, her eyes locked onto the growing bulge. "What's that, Allen?" she teases, tracing her fingers along his length. Allen, unable to resist his sister's advances, lets her explore his hardness. Soon, Claire is straddling him, her natural small tits bouncing as she grinds on his enormous cock, their shared taboo lust consuming them.