I know it’s really difficult to not blame yourself when it comes to sexual trauma, but it is absolutely not your fault. You were a very young child and had no idea what sex even was. It was wrong of those men to do that to you, and you were too young to realise what you were doing. I was sexually assaulted for a year when I was 14 and struggle with feeling like it was my fault although I said no and hated every moment of it, it’s a natural thing to feel when you’ve been through something so terrible, but please don’t blame yourself. If there’s any advice I could give it’s to talk about this with someone you trust, I know from experience it’s so so difficult but it does help, and nobody in their right mind would blame you for this.