Just say "Oh! Really!" each and every time she offends you. She'll give up after a while.
you clearly need more practice
Shut up you *****.I am NOT listening to your toxic bullshit any longer.<br />
But maybe your husband cannot stand up to her either.
stay away from her
Are you by any chance an Indian? Indians usually have that kind of a culture of taking care of parents. I suggest, stand up for yourself when it gets too much.