I can't understand why she can't let go of arguments? We had an argument when visiting my sister 2 weeks ago and Mom didn't like it that my sisters and I were talking in the bedroom. She came in and started an argument about we were always against her. When we tried to tell her we weren't talking about her, she said we were lying to her. She doesn't understand that it isn't always about her. My sisters and I had not been together for a few years but all mt Mother saw was that we were closing her out.
Since we have returned from our trip, she keeps bringing it up and wants to know why I am not on her side. I keep telling her it is not about sides and then I go in another room. This morning I hugged her and within a minute she brought up the whole thing again. Why can't she let it go?
I'm not sure there is any magic thing you could do other than to either a) be honest and explain that sometimes sisters just want to talk about sister stuff and it wasn't a slight to her, but a compliment to her that she raised you to want to be with each other or b) to claim you and the sisters were actually planning a surprise party fo her...or maybe c) sit down next to her beSIDE her, lean on her just a little and say but MOM...here I am, then sing Nationwide theme song- "I'm on your side!" as loudly and out of tune as possible.
Then have a chocolate-eating party with her, and make sure she eats A LOT. It's almost as good as Prozac at raising serotonin levels if the dose is right.