My Mom Had Sex With A Random Man In My Room

Yesterday i was looking through some of my childhood pictures through a hard drive on my laptop. Between photos of myself there were photos of my mother in my room licking a man’s ass (The photo was dated to 2013, i was 8 at the time). I (absolutely horrified and shaking) continued to look through the pictures. The man was on my bed on his back legs spread, my mothers face between his ass cheeks.. There were also pictures with him naked in high heels on in my bed and my mother naked in my bed, as well as her licking a woman’s pussy. I am shaking again as i’m typing this. I ignored her until an hour ago when i confronted her about what i found. She claimed multiple times that this is a completely normal thing to do and i yelled at her, that i don’t care what she does but how disgusting it was for her to do it in my bed. I don’t know what to do or what do think and would really appreciate advice on how to move forward. My mother “bragged” multiple times to me growing up about with how many people she had sex with, while i was with my father (They’re divorced). I don’t have any family besides her. My father physically abused me through age 3-11, which my mother knew. I cut contact with him at 11 against my mom’s wish because he tried to cut my throat and his. He said “I want to die, so i don’t have to be your father anymore.” in German, which i’ll probably remember for the rest if my life. I cut contact with my mothers family, as they emotionally abused me as well. As you can see i don’t have anyone in my life. While i wrote this i noticed it sounded fake, i promise it is 100% true. As i’ve said i would really appreciate advice on what to do. Thank you
(Sorry if there’re grammatical mistakes, english isn’t my first language)