Sharing my Fiancee with my first bi experience [MMF]

I had a really close friend in school, we would sleep over all the time. At some point we started talking about porn and videos we saw/liked. We’d look them up, one of us would hold the phone and we would jack off together next to each other. It became a ritual for years and we spent a lot of time at each other’s houses. Eventually it got boring and I ended up sucking his dick instead, I still remember the first time. It was morning, we were in the same bed, I had my hand on his leg pretending, both pretending to be asleep. I slowly creeped towards his cock and once his dick was hard I knew he was into it. I gave him his first blowjob (my first time sucking dick aswell). I went to town both enjoying it until he inevitably blew in my mouth. We continued the trend but never really talked about it, it was just something that would randomly happen if I was in the mood. Eventually it progressed into him fucking me a couple times. We were young at the time so naturally as soon as his cock would slide into me we would both cum instantly.