First off, if you want to help, stop encouraging her.
Please, it's the best. If you want to ease your mind, get her an online shop.... Tea/coffee, milk, sugar, beans etc ... Sort of stuff you'd take camping!
Now, I have mental health issues, and grew up in care, and was never taught saving or control of money. Money goes into bank, it goes out the bank. Every time I've lived by myself (which has been the vast majority.of my adult life) I've struggled with money... The biggest difference, is I had no family or (to talk of) friends, who existed or could help me out.
If.i ran out.of money, then I had no money. Yes I smoked (still do) and usually had money for fags (I bought enough every time my money was paid in!
Then I did some shopping.
I never went out, I didn't drink (still don't drink in any real sense), I never had spare money, but I had what I needed. I bought second hand clothes from charity shops, or just made do.
I still am crap at money at 50. My fiancee gets the money that comes in, and she sorts the bills. If she didn't and she was like me, we'd be buggered!
Luckily, she was taught money skills as a kid.
The local councils are helping those who have been ordered to shield and are vulnerable.... The 2 are often one! If she has received a letter from the NHS telling her to shield, then the council will help.
Due to the fiancée currently under the cancer unit, and getting the shield letter, we get a food box each week.... It ain't great...
Loaf of bread, long life milk, tea bags n coffee sachets, 1 tin of tuna, a bag of cereal, a few tins of soup, 1 tin of peas, 1 tin of fruit, and a packet of biscuits, bag of veg, and a bag of potato.... So not great but enough to survive on.
Of course, I'd love to get sugar in that box ... Tea coffee n no sugar 🤮
Luckily, despite my own health issues and limitations, I can go out and do a small shop to make that box into meals.