I got a scumbag when I saw my sister being raped by my mother's new wife.

Our mother had a crush on someone and was happy to remarry... He suddenly passed away... Everything went crazy from there. My father-in-law started domestic violence against us, and my sister forced me to take a mixed bath. At first he was desperate to help. But seeing her sister being played with by her father-in-law, she got an erection... That's when I realized this... I want to see more... Become more forced... Be defiled... No, I should just have sex with my sister lol