Ayane, who had just gotten married, was confused about her relationship with her husband's stepchild. The father, who had been watching the relationship, persuaded his son to go on a hot spring trip with him. Wanting her son to accept her, Ayane decided to bathe in a mixed bath with him. Her son's crotch expanded as he saw her ripe body. A mother and son offer their bodies to their embarrassed son and indulge in lust!