Should I tell them ?

Im not sure how old I was, I only have broken memories. My tias husband used me for his sexual pleasures. Everything from pinning me down and rubbing me with his dick, to trying to get it into my mouth. I never told anyone until he left to mexico never to be seen again. When i finally told my mom and started saying a few things that happened when I was 8 years old. I couldnt tell her all at once because I was embarrassed and ashamed.

I finally came out and said the entire store when i was about 16 years old and couldnt take the nightmares and insomnia of it all coming back to me after trying to just forget it. I couldnt take it anymore and became suicidal. I was sent to a mental institution. I wasnt there long just two weeks and then sent home, no one even talked to me about what happened.

What i havent told anyone is he also made my cousins ( brother and sister ) and i do sexual acts to eachother. Theyre acting out now and having all kids of sex with all the wrong people and getting into trouble. My family is looking for answers, should i tell or is it too late ?