[throwusawayus]

Parents can be profoundly weird about this sort of thing.

I've had a couple meaningful equity events -- not as large as OP's but same order of magnitude in combination -- and have discussed this with my parents several times over the years. Despite otherwise being of sound mind, they're incapable of remembering it. It's the strangest thing.

I've been semi-retired since my mid 30s. My parents honestly seem to believe I'm unemployed and just can't get a job. They keep offering me money. Recently they keep mentioning how it's such a good time to finally buy a home since mortgage rates are low. This despite the fact I live in a large nice condo that I paid for in cash years ago. They've visited several times.

No matter how many times I try explaining my situation to them, they just can't retain it. It really bothers me. I've given up and just change the subject any time it comes up now.

Overnight windfalls are great, don't get me wrong. But they can certainly impact your family relationships in negative ways.