Weird Love Sex Thing

Apologies if this doesn't make sense properly I've been drinking. So I was in a gay relationship when I was 18, sort of. My gf had an ex she was fucking on the side and I was fucking her best mate purely because she was skinny with big tits and I didn't want to be left out.
Anyway not long before we broke up after being together for 10 months I came home to T passed out and her ex in the shower, I checked her phone and she'd text saying if I fall asleep fuck me till I wake up. There were a lot of bottles so she wasn't waking up easy but I decided to go for it with my strapon and surprisingly she woke up and really got into it then he came in and as the room was dark and we were covered didn't notice there were 2 of us. I made her stay quiet and everytime he thrust his cock in me i thrust into her then she orgasmed and holy shit that was like a red rag to a bull he fucked me so hard we both ended up screaming out which he realised a bit to late as he started coming deep in me then pulled out.
He turned the light on moved the cover to find me with my rubber cock filling T and his cum running out of me onto it as I slid in and out of her.
T wasn't caring she reached around and scooped some up and put it in her mouth then kissed me making me suck it off her tongue and calling me a dirty slut. She called him over and begged him to let her suck him hard again while I fucked her. As soon as he was good to go again we switched and she fucked me hard and fast while he ploughed her then came again.

So here's where it gets interesting. We both fell pregnant, she got back with him and I left town not telling them I was having his baby. I had a new gf who loved me and I'm still friends with T. Still can't find the way of explaining that I had her now husbands baby though.