OK So you put your house on the market.
You get estate agents in, declutter, repaint, stage the house for sale.
You start looking around for somewhere else to move to.
You get an offer, but its below asking price ?
You look for somewhere even cheaper to move to.
You have to pay estate agents fees, convenancing fees, surveyors fees, removal van fees.
You need to pay to see a financial advisor because even if you port your mortgage it will be for a different amount and now interest rates are so much higher than they were five years ago, so the mortgage might even cost more or the repayment portion might have to be reduced.
The purchase of your new property is delayed so you have to pay to put your things in storage and rent until the sale goes through.
Even if it all does go through - you will be considerably out of pocket just trying to move. Not to mention that the cheaper property might be further from work so higher travel costs and may need decorating / repairs -
Do any of those costs come off the £50K?
Even if you go through all of this and people say allow a minimum of six months to sell/buy... so that's the next year of your life taken up with ...
If you do all of this.. what guarantee is there that your mother will be doing the same thing and will ACTUALLY move.. that she won't just decide she can't be bothered and will stay where she is and spend the £50k as she spent £100k in 5 years.
What if she decides to give the money to your brother and or the Aunt who is suddenly so interested? What if that was the plan all along?
Even though you are feeling guilty etc... and don't want to say no to her, you cannot allow her to evict you from your home and take away all your security.
Please don't make any offers to her atm. None. Just hear what she has to say. Let her show you the area she wants, the property she's seen and how much for etc.
This could be whim that peters out, with a bit of luck. Oh and tell your Aunt to mind her own damn buisiness. Anything your mum wants to say to you about it should be said directly to you, not via a flying monkey.