Problem with Alcohol

I was dating a nice girl and now she is my wife is pregnant with our first child, but it's actually my second child. While dating my now wife there was a party at her mother's house and my then girlfriend had to go to work as she is a nurse. But wanted me to stay at the party and so I did. The party slowly ended and there was just me and my soon to mother-in-law 39 divorced both had a little too much alcohol and we ended up in bed fucking and were still there in the morning when we were found by my now wife. Instead of getting upset she joined us, and we had a threesome. We were engaged only 2 weeks earlier and she didn't seem to mine me fucking her mother. Anyway, the deed was done, her mother got pregnant and hence the second child. We all live together and I regularly fucking both of them.