Update: My (26f) best friend (23f) might be in love with my husband (26m). Where do I go from here?

Original Post

This update is hard. Everything about this situation sucks and I don't know if I will be okay for some time. Baby and I are currently staying with my friend, Tanya,

To start, James and I are getting a divorce. Karla is no longer a friend to me or our mutuals. The betrayal is too deep for her to be friends with our group.

As most of you assumed, James and Karla are indeed having an affair. It started about three months ago and just turned physical one month ago. They were planning on just up and leaving after James served me divorce papers. They used the ruse that he was helping her through emotional issues to hide the fact. I was crushed. She wanted to clear the air before it got worse. That was when she dropped a huge bombshell. James was going to try and get me to terminate my rights to my child in order for Karla to adopt her. The reason? My borderline diagnosis a few years ago made me unfit to be a mother and he was sure that the courts would agree. She then handed me two separate stacks of paperwork and left. I am contacting a lawyer as I am writing this.

I was seriously hurt. You guys were right. Karla was a snake and only told me this so she wouldn't feel guilty. However, I am not letting my soon-to-be- ex-husband bully me into termination of my rights. I called him afterwards and got very heated about what was going on. James just sat there in silence. I was crying afterwards. I pleaded with him to tell me what I did wrong.

For a little bit of backstory: I had a near-fatal complication with my delivery of our daughter where I bled my entire labor. I had to have two blood transfusions and haven't fully recovered from it. I was not cleared for any extrenuous activity for three months, including sexual activity. James was getting unsatisfied with all my doctor's appointments and not getting the sex that he wanted. I was hurting and ended up needing another procedure to remove some placenta that didn't naturally come out. I had to have my tubes tied because if I have another child, it will kill me next time. James wanted at least two more kids and this put an end to his plans.

I married a monster. We were together since we were 15 and this is how he repays me? I thought I knew him. He was acting so caring and nice to me. I am absolutely heartbroken. I'm not even sure if I am going to update this anymore, but if I do, it'll be after the divorce settles. Thanks for all your concern. I'm going to step back and take some time to adjust. There is no chance for a healthy co-parenting situation. I'm fighting for primary custody with supervised visits. Karla will not have any access to baby, as I will ask the judge to make a clause preventing her from interacting with my daughter. Thanks for all the advice!

Edit: I forgot to add that I contacted his mother and Mark this morning. They are furious that James is doing this to me. They are helping me foot the cost of a lawyer because I'm a stay-at-home mom and college student. They have kicked James out and he is now staying at our old house with Karla. He did give me the courtesy to get my stuff and didn't put up a fuss about me taking what I wanted. He told me that he will keep in contact for divorce proceedings.