Steamy incest - Mother and child bathing

Fuyuhiko had a strange habit. When her father leaves the house on a business trip, she peers into her mother Ayumi's bath. Her mother, who actually knew her son, asks Fuyuhiko, who peers in as usual, to say to her, "Let's go in together." Fuyuhiko is confused by the suddenness, but from that day onwards the bathroom becomes a forbidden place for the two of them.