Unkind words

My husband died in August from Parkinson’s. We live in the same town as his sister and brother in law and have always gotten along well with them. During the days immediately around his death and afterwards, his sister said some unbelievably horrible things to me and to his son. She’s always been a little snarky, but this was pure animosity. I can’t get it out of my mind - why would she drag down his memory in conversation with me or his own son? I know people can say awkward things around death. This was much more than that. Anyone else with this experience?