Although she has built a happy family, Chitose, a mother-in-law, has no more sex with her husband and is pent up with desire. Her hidden carnal desires are discovered by her son-in-law in the course of her daily life, and she is forced into an affair in the family! The son-in-law has always had his eye on Chitose's huge breasts that are ripe on her chest. "Mother-in-law, you Kokoro want a young cock, don't you...?" Even though he knows that it would be a betrayal of his husband and daughter, his ripe body cannot stop him from committing adultery in the company of his family...