About 7 years ago, When i was a teenager, about 14 years of age, i did experimental sexual acts my 13 year old sister. Back then we didn't know much about sex and were very open to each other. We told and did things that would seem strange to other people, but it were just experiments for us. We knew that we shouldn't get caught doing these things so we always did them in secret. It started out with flirting and experimental kissing. Again, we didn't know much about sex so we just did things that felt good and we didn't care a lot about morals, we just did it because it felt good. We already had pretty developed bodies, like my penis was becoming larger, i had frequent erections and my sisters breasts and butt were already pretty large and growing. After the experimental kissing we found out that masturbating felt good. When we were home alone we would masturbate next to each other and later gave each other services. I would finger and/or lick her and she would give me handjobs and blowjobs. It felt really good and we did it just for our enjoyment. One day in winter it was very cold and when we both came home we got into bed together.
I told her I heard some older dudes at school talk about sex and the penis/vagina relation. So i asked if we could have vaginal sex and she agreed. I got on top of her and put my penis inside her and it felt so good. When i began thrusting we both moaned and it was the best feeling in the world. We continued for about 20 minutes until i came inside her. We didn't know what it was so we didn't bother getting it out or whatever. We had sex like this about 3/4 times a week and i always came inside her. Later we found out that that's the way you get pregnant and after that we stopped. It was a wonder she didn't conceive and i don't know how it would've ended if she did. Now a few years later we haven't talked about it or whatever and i don't know what to do. Should i keep it to myself or talk to someone about it??