What to do about my Husbands ex Bitch that has to much control?

ok, what if the situation were like this… The Ex has her own freakn issues and will not let my husband see his lil girl unless she is always there?? My husband had a summer fling with this 39 year old woman and she accidentally got pregnant.. she wanted to have an abortion, but then decided not to, and now id super attached to her child… my husband wasn’t in love with her, it was just a summer fling .. ( Mind you, I was not in the picture, I met him 1 year later and then we got married.. I understood and accepted that he has a daughter , It didn’t bother me.. He used to give her 100.00 dollars a week for the child and he is only able to see her when she has time or when she feels like it and she ( The kids mom ) always has to be there… she didn’t get along with any of his family and all of a sudden he gets married and now she’s best friends with his mother and still won’t allow my husband to see his daughter without her being there… He is a hard working, loving man, who deserves to spend time with his daughter and her not be there … he came from an abusive home and his parents divorced and re married 3 times and finally went their seperate ways but through those divorces the kids, suffered a lot and he doesn’t want to put his lil girl through that, and through the courts because he doesn’t want his daughter to go through what he went through.. which , ok, I understand, but still… I am the wife, the one he loves and I need to figure out a way to come to terms with this, and make him understand that he needs to put his foot down.. This female ( his baby’s mother ) has too much control over my husband, he gives her over 600.00 dollars a month, and yet he is able to see his kid once every 2-3 weeks… My husband wants us to start a family, but I don’t want to bring any kids into this world having to be put through this drama and I don’t want that Bi**ch around my future kids… I don’t even want to meet his daughter for the same reason, I want nothing to do with them… and it’s not the kids fault but my husband is scared to put his foot down and doesn’t understand his kid needs more time with her dad, and he needs to put me his wife first before the horrid wench that was a whore he slept with out of pitty.. he is missing out on his daughters life because of that witch and I hate for it… he is a great father..