my mother in law and my brother in laws partner came over this morning, i left the room she thought i had gone upstairs but i was putting clothes on the raditar on the landing. i could hear her slagging me off to my brother in laws partner using f;s and all other offensive words. i was really shocked as she is lovely to my face, but what makes me mad is i havent done nothing wrong. i was going to go in to confront her but i didnt want to upset my children. what im really angry over is the language she used infront of my children as they were in the room when she was stabbing me in the back. as anyone been in a sitution like this before, what should i do as i dont want to cause arguments.