Ever since his wife became pregnant, their marriage has been filled with constant arguments, and Murasaki always takes his side. She is youthful and shapely enough to make him forget she is his mother-in-law, and his pent-up desire leaves him staring at her breasts and ass. One night she walks in without knocking while he masturbates, and her devoted hip work soon has him hooked. She keeps craving more sex, and even after he reconciles with his wife, he cannot resist her big ass or end their secret affair and repeated creampies.