How old is your mother?

It sounds like she was "alone" for a while and now has you and your family living with her?

Could it be overwhelming for her, and she tends to express it in ways that "hurt" you?

I am trying to get an idea of what kind of life she was "used to" before it "changed" with you and your family moving back home. It sounds like your father passed and she has been alone for a while and has adapted to the quiet of being "alone" and not "waiting on anyone". It can be very "difficult" to be "older" and live in a low key and quiet style for a while and suddenly have people "constantly" around.

OE