Does she not understand that by hurting you, she is hurting her child, too. She does not respect him/her if she does not act respectful toward you. A child should not have to cut off contact, but limit it if she refuses to cooperate.
Your spouse needs to understand that support of you does not mean he/she is taking sides and does not diminish the love he/she has for his mother. But, it does mean that he/she will not allow disrespect toward their spouse.
Be cordial, but keep your distance, this is often the best way to handle the situation. Keep visits to a minimum. Do not invest any more emotional effort into trying to have a good relationship with your mother-in-law. It also helps to feel sorry for your mother-in-law because in the long run, the person she is really hurting is herself.
Perhaps it would be beneficial to seek guidance from a marriage counselor (for both of you - husband and wife). The counselor will be able to give coping strategies and how best to deal with your mother-in-law.
One of the hardest parts of a negative relationship with your mother-in-law is keeping your mouth shut when she brings out the nitpicking, critical comments. Being polite is not the same as putting up with what is being done; you're still perfectly entitled to stand up for yourself, but it is about not stooping to the same level.
Here's few things I've learned along the way:
- Even if she says nasty things about you, don't repeat them.
- Don't criticize her in front of your spouse. Your spouse will be stuck between a rock and a hard place, and even if he or she starts to see your side of things, it will be hurtful to have to join in any undermining.
- Equally, never criticize your spouse in front of her; this will simply make her defensive and cause her to see you in a bad light.
The bottom line here? Abuse is never okay, no matter what form it takes or who it comes from.

