My stepfather I hate is being raped at night...

With the opportunity of getting married, Mari quit her job and went on a happy married life as a housewife. However, there is one thing that Mari complains about is that she lives with her vulgar father-in-law. She doesn't want to be alone with her father-in-law during the day when her husband isn't around, so she has no choice but to return to work, but after returning home from work, she ends up getting tired and falls asleep at home where only her father-in-law is. When the father-in-law finds the defenseless Mari, he makes the most of his son's absence and plays with his young body and rapes Mari. From that day onwards, whenever the two of them were alone, Mari would always violate her...