Riko was caught by her son while she was masturbating. Things progressed from there, but her son felt unsatisfied and made a proposal. "Let me insert it into your backside." "No way, anal is... dirty and painful..." Riko initially refused, but after having a vibrator inserted, her son's rock-hard penis thrust into her asshole. Along with a scream, she gradually sank into the swamp of pleasure...
