Mother and child bathing incest

Yu and his only son, Kiyotaka, are left at home at the luxury apartment where his sister lives for a while on a trip. Although she was a little shocked by her sister who didn't care about Yuko and the others' circumstances, Yuko smiled as she saw Kiyotaka unable to hide her joy at being able to live in a mansion. "Mom, let's take a bath!" Kiyotaka suggests to Uko, looking at the bathtub that is likely to be three times more in his home. The two end up spending their bathing time with no mother and child in the water...