It really only takes one of you to stop the fighting. All you have to do is disengage. I know that sounds simple — and the truth is, it is! 😀 If you feel that she’s engaging you in a fight, get out of your old pattern of getting into “the ring” with her. Instead, don’t respond or else agree with her. Or give her a compliment — or change the subject, or leave the room.
See if that works! Let me know how it goes, and please follow me @AskAprilcom on Twitter.