On a hot spring trip with her foolish son, the mother, touched by her son's feelings, crosses the line and they make love... She throws off her yukata and becomes completely naked, climaxing repeatedly as her son performs cunnilingus on her. She inserts his penis herself in the cowgirl position, saying, "This is what I wanted - it feels so good -" "Mommy's going to cum again!" as they continue to make love on the tatami mat of the inn. The mother becomes a woman, her face contorted in shameless pleasure as she enjoys unprotected sex! *This work is "...