@HereForItMaybe I feel like I'm in a no-win situation;
The dilemma you have is deciding between what you feel most bad about - is it losing your home or disappointing your mother.
She gave you a gift and legally she can't ask for it / demand it back.
Morally, she shouldn't ask for it back.
But she has asked for it back and if you don't give her the money you feel I'll be the awful greedy daughter.
AND on top of that My aunt (her sister) has now been telling me I really ought to give her the money back
Your mother has put you in a situation any decent mother would never have put you in.
I wouldn't do that to my daughters. Or to any other family member. Or any of my friends tbh.
I may end up feeling furious that I'd made them such a generous gesture when it turns out that I need the money to buy something I want, but I would never ask them for it back - I'd just carry on sulking with myself that I'd made such a stupid decision.
You're not an awful greedy daughter. Your mother may want to think that because it makes her feel better, but it doesn't mean it's true.
I don't know your family dynamics, but why did she make the gift if she didn't mean it?
was it because she did actually mean it at the time?
or because she wanted to make a 'grand gesture' ?
or because she just doesn't think thIngs through?
and she's now blaming you now that she's changed her mind ??
I nearly declined the gift at the time as I felt she may regret it but I knew my brother would definitely not decline!
I would have done the same as you under the circumstances tbh, and accepted her offer
Whatever the reason, it's truly not your responsibility to second-guess people's motives.
Sometimes - hard though it is - we all need to accept truths and accept that actions have consequences - even when it's parents and they think they know better!!
Tbh, I think it's even more shameful that she's asking you, as opposed to your brother, to repay the money, because it's 'easier' for you ...... but that's possibly a whole different question .....
I, personally, don't feel that you should feel guilty about not indulging the wishes of a woman who sounds quite entitled and who (apparently) makes decisions that affect people's lives just on a whim, and who also expects other people to put her ill-thought decisions right if she's made a wrong decision in her life
You accepted a gift you believed was made in good faith - I would just stick with it tbh and not do any more worrying 😊