Hi Dark Heart, thank you for replying, appreciate it.

Unfortunately, nothing I nor my dad or my 2 other siblings have said or done been of any help, or convinced her that she needs help. I think part of the reason is that she fears that she will be committed to a mental institution if they find anything off. She does not even want to go to our GP at this point. We've offered to all go with her and stick with her no matter what, but none of that has any effect.

We are in the US (IL, been here for 20+ years) so involuntary hospitalization is not an option, as you mentioned. I don't think she's a danger to others as her outburst seem to be more or less limited to within the house and slamming doors, windows, dishes, yelling, etc, but then I don't know if this is going to continue to get worse to where she might be a danger.