I think your husband is mamma’s boy. He might have looked mother figure in you and preferred you even though you are elder to him. His mother’s disliking for you is quite understandable. Try to talk to him on this issue. You should also try to share your feelings openly with your mother in law. After all, she is a woman and she will understand you better, only thing you have to do is to give her an importance, which she is getting from her son.