Michelle's heart races as she listens to Alex's muffled moans from the other side of the bathroom door. Her imagination runs wild, picturing his massive cock straining, ready to burst. She can't help but touch herself, her fingers tracing her slick folds, wishing it was Alex's thick shaft filling her. She's never been this close to breaking her religious vows, but the taboo thrill of her brother's unspoken desire has her panties soaked and her body aching for release. She bites her lip, stifling a moan as her fingers bring her to the brink, Alex's grunts echoing in her mind as she imagines him finding his own climax.