Steady decline. Depression?

And mum is sitting in the kitchen with the rubbish bin emptied, cutting up all of the plastic so it doesn't take up so much room.
Now that doesn't sound like a bad idea but she has no concept of grubbing around in a messy bin with her bare hands.
Each day brings different things, some that we have tackled before, some new. Mum has been asked on several occasions if she thinks she is depressed. Of course the answer is no, she is ok, quite happy with things as they are. I however think differently. Each day she is sombre, never smiles, needs encouraging to do everything. Every morning I have to smile and say good morning, the response is such a miserable face, she looks permanently depressed. i don't want her to be on any medication for that as it brings it's own problems and she can't take tablets anyway, they get stuck in her throat. So although I think depression has something to do with the way she is I will not push the point if she is happy to tell the doctor she is ok.
Christmas is here again, this year we are having lights everywhere, cards a tree. We still have the bah humbug attitude but this year we will be spending it with aunt and uncle as well and aunty is really excited about being here and spending it in good company instead of on their own.
Why is mum so mean with money, she never used to be like that. Apparently we are spending too much on food, too much on presents, she doesn't want anyone to buy her anything and she doesn't want to buy anyone anything either. We ignore her despite more exclamations about the coat we bought for aunty. How on earth could we even think about spending so much on someone, we tell her it's from all of us and aunty will be over the moon with it. We are rich because we have bought a joint and some wine. It seems to me this disease exaggerates the personality traits of the affected person, mum was never mean and would be happy to chip in with a present.
Well we are going to have a bloody good holiday this year.