As the clock strikes midnight, a dark-haired vixen slips away from the family gathering, her eyes locked onto her brother-in-law's bulge. She corners him in the study, her hands roaming over his chest as she backs him against the desk. Her fingers trace the outline of his cock through his pants, feeling it harden under her touch. She pushes him onto the desk, hiking up her dress to straddle him, her wet panties rubbing against his now-visible erection. She grinds on him, a smirk playing on her lips as she teases him, her breath hitching as he grabs her ass, pulling her closer.