Azusa, a busty wife with a natural sluttiness, feels that her sex life with her middle-aged husband has become stale, so she proposes a wife swap with the wife who lives next door. She shows the husband next door her husband and the wife next door taking a bath together and starting to have sex, and presses her sexy big breasts and big ass against him to entice him. She gets excited watching her husband and the wife next door having sex up close, and ends up joining in. She then ends up having sex with the young husband next door, and her excitement reaches a peak, making her pee her pants as she has sex. Her husband and the wife next door join in, and she gets even more excited.