Around 5 years ago my family moved into my grandmothers house shortly after my grandfathers passing, ever since my parents sold our home and moved in it's like she despises us (me, my sister, mum and dad) to begin with she would just be silent and make arguments out of nowhere, would moan about the mess of the house (even though my mother cleans it every day after she comes home from work) would say we don't want to do anything for her when that's what we moved in for and calls on other members of my family (cousins, uncles etc) to take her places when we could have easily taken her. Now 5 years down the line things still aren't any better she has been diagnosed with depression and diabetes of which we know by finding out from other family members because she doesn't tell us anything, I only work part time so I'm in the house the most and hear her anger outbursts a lot, she mostly takes it out on our dog by screaming at him, she used to throw things around the house but no longer has the strength to do so, she leaves the stove on constantly and always leaves our front door open. What is worrying though is that she just seems to be like this around us and it's like a different person when anyone else enters the house?! I'm just wondering if there could be signs of anything like bi-polar or dementia? I'm not familiar with anything like this I just don't know anyone else's grandmother that acts like this.