In the dimly lit room, the siblings sway together, bodies pressed close, the scent of alcohol heavy in the air. The sister, her eyes glassy with drink, reaches out to stroke her brother's growing bulge. He growls, pushing her hand away, but she persists, unbuttoning his pants to release his throbbing cock. She licks her lips, taking him into her mouth, slurping loudly. He grips her hair, fucking her face, his moans mingling with her gagging sounds. She pulls back, gasping, before pushing him onto the bed and climbing on top, impaling herself on his length. They move together, rough and desperate, their bodies slapping together, until they both collapse, spent and ashamed, in a tangle of limbs and regrets.