I heard my crush fuck her new man without them knowing I could hear, found out shortly after they had an ‘accident’ [cuckold’s perspective]

I was staying with some mutual friends recently, they've got a big share house and there was about 12 of us. A friend who I have asked out before (she saw us more as friends) went with a guy she's started seeing casually.
She lives further away than the rest of us there, so the plan was always for her to stay (3 of the people living there were gone so there were 3 rooms going) and the other spare room was taken by someone else. There was set to be a spare room, and despite not living too far, I was tired and opted to take it, about 30 minutes after my friend and her man retired to their room, which was the one directly next to mine…
At first I heard giggling and kissing, and started to get ready for what was next.
They didn't know anyone was in the room next door and didn't hold back. Every time I heard a moan or bed shake at the start my cock throbbed, and by the time they got into it, I was stroking like a madman, ear against the wall trying not to miss a thing. Her moans were the sexiest thing I've ever heard and it was so hard to hold it, I nearly came so many times before they finished.
I barely slept after, it was late anyway, and I didn't want to miss any 2nd rounds.
I didn't hear anything after that, but I haven't been able to stop getting horny thinking about it ever since, and now every time I get hard I wonder what they're doing.
The hottest thing was hearing through mutual friends that they went to a clinic together shortly after because she got pregnant. I can obviously never know for sure when I happened, but I can't help but imagine….