Yeah, I agree... I don't think I am buying this story. As a pp said, the last sale was only 6 years ago. Why would a woman in her mid 60s buy such a big house, only to whine that it's too BIG 6 years later? At 64-65, (which she was when she bought this house,) most people will be downsizing to a small, manageable 2 bed home - probably a bungalow.
Also, I don't 'get' why ANYone born in the mid 1950s (which was when she was born) would have a house decorated/presented like this. It's giving 2020s design and decor vibes, and no-one I know of that age would have a house that looks like this, all black, white, and grey with nothing in it. No ornaments, pictures, collectibles, paintings, photographs, nothing... The place has no soul.
Not buying it. I don't believe a 70 year old owns this house.