Futago Haha

With my parents frequently traveling abroad for business, I'm left living with my aunt and also my mother's twin sister Nanami. One day, the lustful affection I have for my mother has driven me to rape her twin sister Nanami in anger. It is then that I discovered that Nanami was a virgin. From that day onwards, the days of Nanami being violated by me continues, all the while keeping it a secret from my mother Mutsumi. However, one day when I violated Nanami, I discovered it was not my aunt that I raped, but my own mother Mutsumi who was pretending to be Nanami...