Is it normal that my best friend and i had sex when we were 8 -10?

My best friend(both female) and I went to the same middle school and in second grade she suggested that we try what each other privates tasted like.... it started like that, it would emerge into fingering and so forth. We'd do it every weekend, sometimes involving other little girls, up to groups of 5. we spent time on Zwinky and other teen/adult forums and we had cyber sex, etc... We both thought we were straight and we talked about dating and liking boys tho??? She is still my friend, and we're both bisexual now, and she told me her father gave her the idea(he lived in utah we live in Idaho) and her father is in prison for molesting his 13 year old step daughter..... I don't know how to feel? Is this all normal?
I'm engaged to be married to a man btw
Also( and perves please don't...) when I was 9+ I've been watching porn? I was punished at age 12 cos I was trying to show other kids (oops lmao) but never stopped me from using various items as vibrators and buttplugs, the works. are all these be haviors normal for a kid? I'm in my 20's now