Should i wait?

My husband cheated on me and got the girl pregnant. He doesn’t love her or want to be with her, but she has been telling him that if he doesn’t move in with her, she is going to kill her self or get an abortion. So he end up moving-in with her. He ask me to wait for him for a couple of months. Just in-till January. Just to make sure the baby is ok because she had some complications. I love him and I believe he is truly regretful of what happened. What would you do in this situation? Should i wait or no