Fling while married that got me pregnant

I married my boyfriend from school, as far as everyone has ever seen we've been perfect for each other but one weekend when my husband was away for work I went out with some people from work and made a series of drunken and out of character decisions and ended up having sex with a friend from work.

My husband showed incredible strength and maturity and forgave me, something I'm endlessly grateful for, but everything is so very different now. No one sees it because we put up a front, we still look like that perfect, high school sweetheart couple but now there is a third wheel.

My friend from work wanted to support his child and be involved as far as I would let him, something I couldn't help but respect, and we now coparent.

I was wondering if anyone else has found themselves in this sort of situation so thought I'd reach out on here. Happy to chat to anyone, hope to hear from you soon :)