No need to feel mortified by that, he just didn’t really understand you.
When I was a young Mum, living in Cornwall, I used to drive a few older ladies to church sometimes ( the church was just a walk for me, but they needed a car, so people took turns taking them.) I didn’t know them well, but just chatting, I said I had heard that a local man had dropped dead in the supermarket car park a couple ofweeks ago.
One of these ladies said quietly “yes, it was my husband”.
Naturally I apologised profusely, but she smiled and said, “
Don’t worry, you weren’t to know”.
I felt awful about it for ages.