In the privacy of his room, the horny stepson unleashes his massive cock, throbbing and ready for release. He strokes methodically, his fat cockhead glistening with pre-cum. His body tenses as he edges closer, his balls tightening in anticipation. With a final grunt, he erupts, his thick cum pulsating out, coating his abs and chest in a sticky, white mess. His body shakes with the force of his orgasm, his cock twitching as it continues to spurt out rope after rope of cum, all without a single touch of his hands.