Sounds like you should get a paternity test on your child ASAP. I agree with the other poster who said she is very immature and very likely wasn't ready for marriage. Also based on your post I feel she didn't seem to be as into you as you are into her. And she may never be. Would you be okay with it if that were the case?
Oh and if she truly loves you she will consider counseling to better her marriage.
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