Was I molested and was it wrong? (Long)

So when I was like 4 my sister who was 10 taught me about sex becuase she was having sex with her 17 year of boyfriend... Yes 10 and 17... And she would show show me little things they did like over the clothes or show me what position they did and it would get worse like a year later it escalated and we would do things over the clothes like she would be on top of me and idk I don't really remember except we did stuff over that clothes, I don't remember details I could have blocked it out or it might just be because I was 5 but I do remember where we were and I can see everything very clearly... I didn't think it was wrong and I don't think she did either we just knew we had to hide it from our mom, the only detail I really remember is she liked to play out a rape fantasy where I would grab her and pin her down and get on top of her and she would do that same to me... Was I molested? After that I went on to teach my best friend about sex and did what my sister did to me except we actually took our clothes off all we did was like lay on top of each other naked and like roll around a little cuz that's what I thought sex was (I'm very disgusted of myself for this but I was 7 at the time and didn't know it was wrong please no hurtful comments) I blocked out all the stuff with my sister until recently (I'm 16) and I also did things with 2 more girls but we were older I think 5th grade so we knew we shouldn't be doing it but we did it anyways we didn't know it was like wrong wrong you know, and then my sexuality peaked at a very young age like I started thinking about sex like actual sex an wanting it in 6th grade. I never did anything tho until I was 15 and lost my virginity with someone I actually loved but honestly if someone would have asked me to before that I probably would have... So my questions are was I molested? If I was, was it my sisters fault even though she didn't know is was bad? After I blocked my sister out did I subconsciously do those things with those girls because of her? Did my sexuality peak at such a young age because of that? Again I feel so disgusting about it already please no hurtful comments