Maybe you could get some therapy that would help you deal with the resulting emotional distress without fixating on the source? Could that be a place to start? @notmoses, got an opinion on this? You’re the workbook king.
I have to say that a purring cat and a hot cuppa are equally effective for voice stress and in-law stress (although the last one does contribute to the first one, damn it). Anyhow, some general coping strategies could really help reduce the stress load you are carrying around.
Pixel.