That’s a tough one!
My parents bought a house the day I graduated high school. It never felt like “my” house so I never became attached to it. My younger brother did live in it for 3 years of high school. His first year they still lived at the old house while they gutted and fixed up the other one, so for him it’s more his house. He used to say he wanted the house when they died. It’s old! Built in 1912. It’s big and nice, but a money pit considering the age. My mother also never really updated things through the years as she really just maintained things. I remember her not wanting to put granite counters in the kitchen when they redid it before they move in. Her reason was that she could replace the counters 10x with the amount that granite costs. Well, guess what? She still has the same formica counters! So, now it’s been 35 years they’ve lived there and my brother doesn’t want the house, I don’t want it, and thankfully it’s clean, but my parents have a ton of crap. Not hoarding type of stuff, but just chatzkes and stuff from entertaining. It’s a big house.
My point in all that is your wife better pray real hard they want the house and that it’s not just left for them as a problem to deal with, which is basically what my parents are doing to us. My parents should have moved years ago, but my mom refused. My father is almost blind and she has stage 4 lung cancer. They aren’t moving anywhere now. So they’re stuck, which means we’re stuck cleaning it out. My father has already said he isn’t moving unless he later moves to a place like “assisted” living, but he really means independent living and he views all those places as too small to him so wants to stay in the house as long as possible. Thank god there’s a caregiver but man it is tough. Whatever you do, just try to purge things out of your house so they aren’t all left for your kids to deal with.