The fact that every poster is in agreement that you absolutely should not take on responsibility for your friend, speaks volumes. It's a rare thread where everyone has the same view.
I would also ask your friend if she has considered her position should you predecease her. She won't be able to stay on in your home and she will be considerably (hopefully - not wishing to shorten your life
) older by then. Where will she live then?
I can only add my voice to everyone else's and say don't even consider this proposition.
MAKE A SENTENCE GAME [FEB '26]
I gave up driving two years ago. I am nearly 85.
