Hi Nicole. My name is Stacie. I know what you are going through because I just dealt with this with my mother in law. In December of last year, I ended up almost sleeping with my husbands friend. I was drunk and my husband and I hit a rough patch. Anyhow, my hubbys mom, when we found out I was pregnant in March, was trying to say it wasnt my hubbys. But I knew for a fact it was my husbands because the guy and I didnt even have sex!!!! She was getting close to convincing my hubby the baby wasnt his until we got our first ultrasound and the baby was too young to have been the other guys anyways!! I say you dont let her get to you. And if he truly loves you, he will stay by your side. I say you just carry on with everything, show him you love him and if his mom starts in on you, just ignore her. Dont risk your baby because she thinks its not her sons. When that baby comes, and she sees him or her, she will know its his. And so will he. Then they can grovel at your feet and apologize for being insensitive a**holes. sorry bout the language :) Hope your pregnancy goes well and keep your chin up!