My coworker said his mom died. Was he lying or joking? If not how should I act around him now?

He said it after I asked if he’s gonna buy his mom anything for Valentine’s Day. He said she’s dead. I was like wow are you joking and he said he wouldn’t joke about that. I was honestly shocked. I mean if my mom died I wouldn’t really just tell a coworker that though. So that’s why I assumed he was joking and maybe that he was seeking a reaction. But now I feel so bad for the man. It explains why he has a sadness in his eyes all the time. He’s in another department and I don’t know him really by the way.

My coworker said his mom died. Was he lying or joking? If not how should I act around him now?
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