MIDE-777 Her mother passed away, and her older sister was raped by her stepfather and younger brother

My father passed away not long after I was born, and my mother had to work hard to raise us two sisters. When we were adults, mother remarried another man and we moved to a very large house. But my mother passed away not long after, and my stepfather's true nature was gradually revealed... He always hated me and beat me... Until one day, I saw him. doing... doing that with my sister...!