I see here that people are portraying the old lady in negative forms. Yes, at times they tend to talk to themselves(as one of the person said here)or may scream. They can have an emotional breakdown/depression considering their age.and they might shout at their kids. But a mother's anger never lasts longer.

No matter how good or bad they are we must never forget that we are here today because of them. The person who is dead might have a real story which will never be revealed and nobody is guna know about it either ever. rather than drawing void conclusions thank god for who you are and because of whom you are here today