Whaaaaaatttt? LOL what can you DO to them?? NOTHING.

You need to consider your reasons for getting a divorce---does it matter if she is pregnant or not? Isn't the lying and the cheating the issue? I mean, if she isn't pregnant, you would stay in a relationship with him? The "deal breaker" is a baby? My never to be humble opinion is that your marriage isn't ruined because this woman is pregnant. Your marriage may be over because your spouse lies and cheats.

As far as finding out if the woman is really pregnant---that should be obvious. However, the paternity of the child has to be established. If she really doesn't "want anything" ( which I assure you she will want child support) she will have to have a paternity test done. However, if she puts on the birth certificate that the father of the child is unknown, or if she doesn't seek child support, legally you have no right to know anything about her or the child if she doesn't wish for you to.

As far as knowing what is truth and what is not? You are considering an admittedly unfaithful man and a woman who knows he is married and is having a relationship with him anyway. In my book, if their lips are moving, they are lying. Assume they are lying until it is proven otherwise. As the old adage goes, a man (or woman) isn't a liar because he lies. He lies because he IS a liar. And that is simply my opinion.

You also need to consider what does your husband want to do? Whatever happens has to be a joint decision---if you want to stay with him but he wants to be with her, what you want, then, would be irrelevant. Perhaps some counseling would be in order for both you and your husband before making any legal decisions regarding your future.