I had my mother's nakedness fully erected in a mixed-bath hot spring. My mother was so happy to see herself as a woman that she fell in love with her son's rough sex.
A hot spring trip where two mothers and their sons went out. A son who felt a woman in his mother's body after a long time in a mixed bath that he entered together, and unconsciously erected. When she sees the shame of such a son, her mother feels so terribly loving about him that she accepts his body. She was still very much struck by a young ginger, and her mother fell in love with the joy she had felt for a long time.