Changed my mind about having a baby with him.

My husband and I got married last June and we talked about wanting more children. I have a 16yr old and a 13yr old and he has a 8 yr old and then a 5 yr old in N Dakota that he supports. When we got together he told me that him and his friend had a few drinks and basically had a one night stand and she got pregnant and she didn't expect him to stay there because he was moving back to Michigan but he agreed to pay child support. However in January I found out from his mom and sister that he not only has a 5 yr old with this women but also a little boy who is like 3. I brought this up to him and he denies the boy because he said the timing and the boy doesn't look like him. It's not just about that but he has only gotten his daughter (8yr old) 3 times since we've been married and when he has her he doesn't emotionally connect with her.. no hugs or any kind of attention... Nothing! I just don't want to have anymore kids and end up being a single mom because he doesn't connect with his children unless they do something wrong. I am on him to get his daughter and I've had a conversation about how little girls need to be hugged and told they are beautiful by their dads. I am just upset because I always wanted to get married and have a baby with my husband. I was a single mom for 16 years.