Your kid from a previous M is going to testify in court so your current W can have primary custody of your children and receive alimony?
Is there something about this you're not telling us? Something that happened in your first M, or something? Because that sounds REALLY messed up.
My first wife moved in a boyfriend. So I moved out one day when I went to pick up my daughter her mother had left the state. I only received custody in the past year. My oldest didn't want a father and only to do what she wants. Plus her and my W have been talking about the D long before I knew about it. They are best friends.