3. Your ally should be your own spouse. Mothers feel very attached to their sons. The problem is that sometimes it is too hard for them to let their child go and be independent. If the center of the mother’s whole life has been her own child, she will not want to let him leave her. It's useless to try to change a grown-up person. It will be much wiser of you to try and talk about this issue to your husband. If your husband is smart, he will not allow the two women to fight over him. Finding a solution on your own might be difficult. Ask your partner for help. Only when you discuss your family issues will you be able to have a successful relationship. Do not hesitate to tell your mother-in-law to call first if her habit is to come over to your place unannounced.