so sorry to hear of the loss of your beloved Dad Sharon, April was when my wife passed away too. Your Mum sounds a little like my wife Ann, she was hopeless with financial matters...lol.. I dealt with everything right through our 49yrs. As I've had 4 heart attacks over the years it was always assumed I'd go first, so I had put everything in place to cover that possibility, though I was a little worried she would give a lot of money away as she was very generous, indeed I had to clear her overdraft several times during our marriage. She could never understand the concept that your totally broke when your down to your last 1 or £2k and should stop spending...lol.. or in her case giving it to the grandchildren etc, so that was always a worry for me, and I fear she would need frequent financial advice from my daughter or 2 sons. However things don't always turn out the way we expect.
I remember how upset I was when I lost my own Dad, all one can do is be as supportive as possible to your Mum, you can do no more except be there for her, as she may be suffering more than you realise. It's never easy when we lose someone close to us, all you can do is take it a day at a time and eventually it will get easier, all of us on here are going through the same thing, and we know only too well how difficult some days can be. If it were not for the fantastic support from my daughter Jo (who was very close to her mum) I doubt I would be here today, in effect we have been supporting each other, and that's what you and your Mum should do....it won't be easy, but with time, you will work your way through this terrible time.
Wishing you much strength, and a hug from me to you and your Mum
Best wishes....Brian