My girlfriend is looking after her father and is very concerned about the level of agression that is shown by him. I will provide an example and then have three questions:

Her mum asked him to bring a tray from the kitchen and initially he brought two glasses, she told him it was a tray she wanted. This happened 3 times during which she may have said "how do you not know what a tray is".

He was peeling fruits and therefore had a knife in his hand prior to this. Suddenly he walked towards her and threatened to use the knife on her.

Questions:

1. We know her mum was in the wrong by possibly agitating him by saying how do you not know what a tray is (not justifying use of knife) but how can she teach her mum to accept her father is not the same man he was before and understand she needs to adapt to these changes.

2. What level of aggression is "normal" for a person with this illness and how have people handled this situation personally

3. It may be that her father needs to have no access to knives, but part of his daily routine is cutting and eating friits for example, how do you move a person away from their daily habits without making them feel you are taking their independance away?

Thank you in advance - much appreciated.