TIFU by asking an acquaintance if his wife knew about his other wife

Obligatory this happened in 2018 - but it still lives in my head rentfree.

I use to do full time background (extra) work on TV and movies and would often make friends/acquaintances on set. This particular person I did a scene with for hours and he talked a lot about his kids and wife. The way he talked about her was beautiful and something anyone would hope to have.

We added one another on Facebook and kept in touch off and on. He always posted about his family and movies he was trying to work on creating himself.

There was a post going around at the time where it would ask multiple questions and you'd answer with how many times you'd done those things. One of the questions was how many times you'd been married and divorced. He marked that he'd been married twice but never divorced.

I naively assumed the 2 was just a simple typo and jokingly asked him if his wife knew he had another wife.

That was when he dropped the bombshell on me that he'd previously been married but his first wife passed away.

He was very nice about it and I of course apologized profusely. He'd never told me about his first wife and he'd never posted about her, so I had absolutely no knowledge. Obviously I would've never made the joke had I known. I truly believed the 2 was just accidentally placed there.

Goes with saying I never make such assumptions anymore. Lesson learned.

TLDR: Acquaintance filled out a questionnaire on FB and put he'd been married twice but never divorced. I believed it was a typo and jokingly asked if his wife knew he had another wife. He informed me his first wife had passed away.