When did they pay their mortgage off, OP? And when did they stop supporting you financially?
I ask because at 60+, I’m still fully supporting one adult DC, and helping the other as much as possible, having paid off my mortgage a few years ago due to a small inheritance.
In my (our) case, I worked full-time since age 18, DH since 16, we got our first mortgage at 21, and paid it off at 56, so we had 35 years of paying a mortgage, but nearly 40 years of full child and adult support for one DC, and 30 for the other, starting from nearly a decade years after our first mortgage payment!
If our supported DC would ever be well enough to get employment that allowed them to support themselves, I would expect to be able to use my money (what’s left of it) by doing some things for ourselves that I’d put off for years by being full-time workers, parents and support-givers!
That might include up-sizing (E.g. if I had a hobby that I wanted to do that I simply couldn’t fit in my current house) or down-sizing, if I wanted to release equity that would enable us to travel, visit theatres Etc. - things we haven’t been able to do because - kids…
Who, BTW, through some of their own endeavours AND a lot of help from us, have been able to do, and which we couldn’t afford when we were young and child-free!
I don’t think you are being fair, OP. These are the people that raised you, probably by restricting themselves. Now it’s their time to enjoy not just providing for everyone else’s lifestyle, but concentrating on theirs…