My lord, your story sounds painstakingly close to my own. My step father was the abuser and my Mother let it go on. She tried to be my best friend in later years telling me too much of her personal relationship and it made me angry, mostly because she forgot one element in that mess, me. I was a child growing up in a toxic environment, and she let it go on. She even lied to family about it when I finally broke down to my grandmother b/c I was afraid to go home. I was called a liar by my own Mother to save my Step Father's own from being "dragged through the mud". I do hope this person found help in what you said, it really was great advice and I wanted to let you know how much what you said really helped me, even though I'm not the OP.