My bisexual husband is having another baby.

Im 34 years old and in a gay relationship with a bisexual man. He’s 39 and we’ve been together for 5 years and married for 6. I caught him having an affair with a young woman 2 years ago, the woman unfortunately got pregnant by him and had his child. We talked and discussed what happened and i was very upset but willing to give him a second chance since he said it was just a “slip up” because he missed being with a woman sexually.
I know its not an excuse to the betrayal but i was trying to be understanding since he is bisexual and has his needs. I was willing to put it behind me and move on but i did clarify i wanted more honesty and communication in the relationship. I knew it was going to be a hard journey for me seeing him be a father and co parent with another person but i love him so much i made the sacrifice and everything worked out fine.

I was also realistic to the possibility that they might have sex again since they spend so much time together with the baby so i told him we could have an open relationship for now (we’ve had an open relationship for 3 years before and it worked for us) but i told him he had to use protection with her (or any woman) and pull out to prevent another pregnancy. He said he wasn’t interested or had the time in meeting new strangers to have sex but if sex happened with his baby momma he would be careful and use protection.

However last night my husband gave me the news that shes 5 months pregnant with his child again and that he was confused and surprised because she went on birth control after her first pregnancy. I asked him if he still ejaculated inside of her and he said yes because she was taking the birth control and thought it would be effective…

At this point i don’t know what to do. Im a very open minded dude…I love him and our relationship is in good terms and i know he doesn’t love her and only enjoys the sex but i don’t know if i can continue seeing him have children with her 😔