Coerced into Sexual Activities

Okay, so, this took place when I was younger, when I around 8 years old. I'm currently 18. I don't remember the whole thing, but I remember quite a few details.

It was my 2 Nephews (who were in their teens), and my Niece (Same age as I was). We where in my bedroom, just chilling. Then one of my Nephews suggested us doing some sexual activities. I was with the older nephew and my neice was with the younger one. I was pressured into touching my Nephews penis and masturbating it, aswell as making out with him.

For years, I've told no one, and neither have they. I'm too scared to speak about it, not wanting to cause any drama in the family. It's a fucked up thing that happened, and I struggle to look at them without remembering what happened. They have good jobs, and are good men, yet what happened back then, it still scars me to this day. I keep having flashbacks, and it torments me.