
Basically what happened is that I was over at my church friends house with my cousins. this church friend has a younger brother. she had asked me if I wanted to have sex. she was chasing my cousin around (jokingly) to have "sex" too. while I had seen porn before and I knew how to masturbate at the time, I never knew about it past a few pics that showed genitals/semen I saw online. so I didn't know about penetration, oral, etc.
I agreed out of pure curiosity and at first we thought of doing it somewhere privately like in the closet, but we could not see so she then led me to her bed and started humping me. confused by this I just ignored it and then tried to masturbate bc I didn't think the humping felt like anything. I then told her I think we should stop and she agreed but she didn't stop really stop until later (may have been 1 minute, 10 idk, my time is very skewed, it just wasn't fast enough for me). there were two other little children in the room, my younger cousin and her younger brother. one even asked to join to which I immediately objected. I just thought it was gross because they were too young. I think I said the "I think we should stop" after they said that or before, idk. I didn't even process that they were watching us I think I was just stuck in what was happening. As soon as she got off of me I told my cousin (other one, not the one in the room when it happened) that we did it.
after that I felt weird and scared that the adults were going to find out. I remember she later teased me and claimed she had it recorded and that her parents might look at it. she'd also randomly bring it up because she knew I hated being reminded about what happened. I've always seen that memory as gross and was angry with myself for not rejecting her and how it might have effected my younger cousin and her brother. it was only recently when I talked to a helpline that they classified it as cocsa. It's hard to see myself as a victim because I exposed the other two children to that and they didn't deserve it, I sometimes have thoughts that I am technically a perpetrator to them. this church friend was also 3 years younger so I feel like ultimately I had the most responsibility.
how do I get over these feelings?