A few years ago my sister and her DH relocated from up north to be closer to the rest of our family in the south west. Given property is so much more expensive down here they and their DC moved in with my dad - temporarily at the time but they're now there to stay. (It would seem. We haven't really had a conversation about it) They pay no rent, bills etc and both have full time jobs. Mortgage in the house up north which is rented out and the rent pays the mortgage and upkeep. Dad's house is big and he enjoys the company. He's getting on a bit - mid 80s, but is generally fit and well. His Will is split equally between his children - us and my brother.
We were up to visit today and she started talking about the future and what will happen when dad passed away. She just said "well obviously if it happens in the next 10 years (ie before youngest DC is 18) we'd just stay in the house and we can sell it and split it once they're grown up". I said I hadn't really thought about it like that and had assumed that if dad passed or if he needed the money in the house for care home etc they'd move out. She got very angry and said that would be making her and her family homeless.
For context, the house is probably worth around the £1mill mark. So I guess we'd have to pay inheritance tax when dad passed. It's an old house so not cheap to maintain - if they stayed who would even pay for that?
AIBU to think that even though they've lived there (it would be for about 5 years now) if dad needed the money or passed away she would need to move out?