So my husband hasn't got partial custody?

The best thing you can do. Get a lawyer and explain everything to them. he could get her every other weekend and one day out of the week. He could get her one to two weeks during the summer and have her on holidays like thanksgiving christmas and easter. She has no right for excuse of her husband. It more likely she preventing her daughter seeing her real father. If the judge granted your husband getting every other weekend and holidays. if she doesn;t follow through that can get on her. That contempt of court and go to jail for that. Since he paying child support he has the right to see his daughter. Go get a family lawyer and take her back to court for visitation. There nothing she can do because he being a good dad.