any advice would be great

Has anybody else dealt with the father of your child’s new girlfriend, not wife, but girlfriend (of only 3 months, might I add) trying to control how you and the father of your baby coparent? Him and I were able to get along and agree on things until he got with her and now he tries to make it what she says go. She also expects me to go through her if I need to talk to him about the baby. I don’t really have a problem with her, but I refuse to go through anybody other than the father of my child regarding our baby, and it doesn’t sit right with me that she wants to control the choices we make for our daughter herself. I sure as hell don’t want him back, and I don’t speak to him outside talk about our daughter, so I don’t understand why she’s so adamant that things go her way and I contact her instead of him.