Does your Aunt get paid rent from the people living in those houses? Is that rent more than it costs to own and maintain the properties? Yeah, thought so. Yes, your aunt is a parasite. She is extracting profit from other people simply by virtue of being the one to own the property that she doesn’t live in. She isn’t providing value, she’s restricting access.

She may be a lovely lady the rest of the time, I’m sure she lives a vibrant and full life elsewhere, but that doesn’t change what she’s doing. Nobody owns “a couple of houses as an investment” if they’re not making money off of them, and they’re only making money by extracting it from the people who have to rent.