When the son-in-law finds himself alone with his mother-in-law, a woman in her prime with an indescribable allure, he embraces her and steals a kiss, saying, "Mom, I've wanted to fuck you for a long time." Though she tries to pull away, when he gropes her big breasts and teases her sensitive nipples, her strength drains away, and she helplessly allows him to insert his large dick. From that day on, the mother-in-law becomes addicted to forbidden sex with her son-in-law. We present four episodes of this taboo erotic drama between a son-in-law and his mother-in-law.