I think you need to rise above the previous disagreement and help her out. She hasn’t called you until this point, but now it’s quite obvious that she NEEDS your help because she values your input.
She’s probably going through hell right now, and yes, it would be callous of you to shut yourself off from her in this time of need.
(Remember the whole thing with the Bais Hamikdash being destroyed because of sinas chinam and all?)