@cimberlee,
Cimber, your just had a baby with a very huge jerk.
His brother is also a huge jerk. If i know that one of my brothers is denying a child i would made him act like a man.
I belive that a child can not bound a man to a woman. That is a foolish concept many people have. There is no guarantee that he will stay with you even after having his baby. But he at least should be accepting and responding to the consecuences of his acts. Babies are not miracles, they are people. He seems to be acting like it wasn´t a big deal and behaving like the foolish teenager he still is.
His life will never be the same after having a child, it is not the time for him to be flirting and teasing other women. He should focus on how he will respond to your mutual responsability If he does not wants to stay with you theres nothing you can do. It can even be the biggest mistake of your life. You should worry for the human being that is now our responsability.
That girl is acting appropiatedly. She is obviously rejecting his advances. He is not a good man for neither of you.
My best friend´s brother is a huge jerk too. He has a 14 year old daugther with his wife. Never divorced, just separated and had a child with another woman. Today this baby girl is 3 years old. But he returned to his wife for a couple of months and had another baby. Now he is separated again of his wife and is living with another woman. This kind of manboys are toxic.
Be very carefull. If he is not trustable you will be better without him. Just be sure to make him give your child his last name so you can legaly fight for money from this man to help you raise your son in case he runs away.