I got a married woman pregnant

Hi,

I've been wanting to get as much advice as possible.
This summer I was on vacation and I had sex several times with a woman, I knew she was married but her husband also knew what we were doing and he was okay with it. It wasn't supposed to happen but it did… I know it was stupid but I only learned yesterday that I got her pregnant and they sent me messages asking my opinion on the situation. They’re not mad or anything, they just want to let me know she’s going to keep my baby. I honestly don't know what to think I'm only 19 and they're both older than me, the wife is 38 and the husband is 42, I live in another city that is really far from them so I can't be too involved but we all live in Europe. They don't expect me to do anything given how complicated it is and they know my financial situation, I’m just a student, the husband would pretend to be the dad and they'd only send me updates from time to time. I feel stupid and guilty but I’m also excited for some reason. I have lots of conflicting feelings but I can’t talk to anyone close about it, not even my parents or else it would make it worse than it would help. I could talk to a therapist or a lawyer I guess, if someone already experienced something similar could I have some advice ?