JUY-046 My Sister-in-Law and I Have Too Much Sexual Desire, Hiding Behind My Wife's Back as She's About to Give Birth... Yuka Oshima

Three years into their marriage, Yuji and his wife Erina are expecting their first child, and they move to their parents' house. Erika's father and older sister, Yuka, live there. Ever since Erika became pregnant, Yuji has been refusing sex, which has left him feeling pent up, and seeing the kind and beautiful Yuka makes him even more aroused. Unable to bear just staring at Yuka with annoyance, Yuji takes advantage of an opportunity when Erika is out and pushes her down...