Ever since my wife got pregnant, we've been fighting nonstop. At times like that, Murasaki always takes my side. Murasaki has such a youthful figure and it's hard to believe she's my mother-in-law. Perhaps because I was sexually frustrated by my wife's pregnancy, I can't help but stare at her breasts and ass. One night, while I was masturbating, she came in behind me without knocking... Her devoted hip movements, different from my wife's, were irresistible! Maybe she's not having sex with my father-in-law, because she wants to fuck me over and over again! Even after I made up with my wife, I couldn't resist the allure of her big ass and we couldn't break off our secret affair! Ahhhh, I want to do naughty things with my mother-in-law forever!!