I'd be having a conversation with people and it starts out pleasant, but then mid-way, I'd ask a question and they'd say it's none of my business. Or otherwise act uncomfortable. I'll give one recent example.

Backstory: Our supervisor lives with his GF and 3 kids. At work (fast food), during downtime, a coworker asked the supervisor if just [name] is his only kid.

Him: biologically, yes. The other 2 are [girlfriend's name].
Me: Does [ex wife] have any more kids?

At that point, he paused before saying yes she does but it's really none of my business.

I asked him why he talked to me that way. He said I just asked him a question about his ex-wife.

Me: I was just making conversation!

People don't seem to like it when I ask questions. But in conversations, people usually ask questions and make comments, right? Is there some kind of double standard?