As I spread my legs wide, my pussy glistening with anticipation, I begin to vigorously rub my clit. I moan loudly, my hips bucking back and forth as I grind against the armrest. My massive ass quivers with each thrust, begging for attention. My stepbrother hides in the shadows, watching my every move. His cock throbs in his pants as he joins in on the action, mimicking my movements. Our harsh breaths fill the air as our mutual pleasure reaches a fever pitch. Our combined moans echo off the walls, drowning out any semblance of privacy.