[Amamiya Mizuki] Mahou Shoujo Okaa-san, Mesugaki ni Naru [Satoru]

A doting mother gives in to her son's begging for cosplay sex and is magically transformed into a petite, bratty magical girl whose tight bear-print top and tiny shorts strain around her swelling breasts, soft belly and plush thighs. Flustered but teasing, she shows off her new youthful body and invites his worshipful attention, from lingering oral devotion to deep, rough vaginal penetration that leaves her breathless and begging. Their playful mother-son taboo deepens into a messy, loving climax filled with sweet thank-yous and overflowing creampie as she fully embraces her irresistible new form for him.