Anonymous wrote:OP, has she been evaluated for cognitive decline?
+1
OP, dementia patients often pick one "safe" person to lash out at. MIL went after me more than once, starting years ago - I was/am different from her (her daughters are identical to her), and she did NOT like that I "dare" be different. That's who I am, no apologies, I never "did" anything to her, but DH purposely chose someone very different than MIL, which is telling! I don't bother with her, because what is the point, life really is too short.
In your case, can you distribute some of the "communication" amongst your siblings?