Is it normal to be bisexual after what happened to me?

This all happened when i was 16 at my Aunt and Uncle's house which they was not there for some reason so only people there was me and my twin cousin's also to add one is male and one is female (both 1 year older then me back then). I was sleeping nude on someone's bed um i know it was a bad move to be nude but hell i didn't it would happen so back off! I was laying on my front part of my body onto the bed with a blanket on then my male twin cousin Kris got curious he took the blanket off me to find me nude so that i bet turned him on so he got lube and also his dick was like a horse. I wake up but still looked asleep so Kris walked in i just thought he lost something until his lubed fingers probed my ass which in my head i thought "damn what the fuck stop that" but i chose not to stop him next he rapes my ass till he cumed in it which made me cum too! (i don't know how that happen) I yell at em then he starts crying next thing he let me fuck Rose his twin sister also my cousin soon more drama till we make a naughty three-way and all agree to keep to selfs. well i come over alot from after all that. nobody cares if they knew what was going on for some reason and my twin cousins loved it when i came over to "play".