Unless you are wealthy and actually want to fund her lifestyle, do not give her any money.
She's spent all her money so do you want her to carry on and spend all yours too? Bear in mind that she's likely to come to you when she 'has no food' or 'can't pay her electricity bill' as she sounds like the type of person who just spends all her money on clothes etc, going out, holidays, a fancy car or whatever her personal indulgences are and just refuses to budget like an adult.
How old is she and is she likely to be capable of working until/after she receives her pension? Do you know if she has any other pension arrangements above her state pension? Once she's of state pension age, she'll get her rent paid and income topped up if she only has the state pension, so she won't be homeless and will be able to cover the basics, but it's not a luxury lifestyle.
Could she earn more either by working more hours or retraining, or could she move somewhere cheaper? Could she sell some of the things that she's bought?
Is the problem that she's on a low income and is always going to struggle to cover the basics or is she just a spendthrift who would burn through any amount of money on non essentials?
What's the history to this? How come she had savings and chose to spend it rather than buying somewhere to live?
The best way to help her, which probably won't feel like it to either you or her would be to stand firm, don't give her any money and help her budget to maximise her income, prioritise essentials and stick to spending only what's left over. Unless of course you want to finance her fun lifestyle.
But if she gets into debt, so be it, it won't affect anyone except her, assuming she's single, and she can't lose her home over it, unless she doesn't pay her rent. She'll just have to deal with being chased by the credit card and loan people if she doesn't pay back what she's borrowed and the eventual bad credit rating/DRO/bankruptcy, that will prevent her from borrowing more money if it all goes tits up and she borrows more than she can pay back.