This is going on in thousands of families but you as a believing and God fearing person should deal with it carefully and humbly.
You must tolerate your mother in every possible way. She is after all your mother and her right in you is greater than explaining. Even if the parents were non believers,b their rights as parents remains great in their children. Try your best to avoid instigating her by any word or act, and always tolerate her behavior and comments. It might be a test for you from Allah to examine your faith in Allah. Never react badly to any of her behavior and comments. Annoying your mother or father causes anger of Allah on you, God forbid.