I am an advanced life coach, so I do have some experience in these areas. First of all, thank you for responding. Second of all, thank you for you and your husband being very big to step up and take care of her. It is the right thing to do but not without difficulty. If she is respectful and a sound mind, would you and your husband want to do it to lay down some ground rules. Stick to them. Never let her divide you because you must come first in front of everybody as his wife and he must come first as your husband, not your mother. She is not in the marriage covenant. If, and when there are problems, and they will be, you and your husband are going to have to talk those out and communicate, then approach her with a unified front, with patience, and with love, at least initially. If she keeps doing the same thing, is a matter of disrespect, and you and your husband will have to address her on a different level. Hopefully it won’t come to that, but it probably will at some point. Best wishes.