Tell me if this is weird or not or I'm trippin lol. There is this couple at work. (I think they are…

Tell me if this is weird or not or I'm trippin lol. There is this couple at work. (I think they are a couple, I'm not sure but they are always together) well the girl randomly asked me if I had kids and I told her yea 2 boys and 1 girl on the way. And that was the end of that convo. Later on in the day she asked me if I was married and I told her no and she was like "oh" and that was the end of that convo. Yesterday she randomly asked me when I was due and I told her and she was just nodding her head like saying "oh ok" and just kept working. At first maybe I thought maybe they weren't a couple and she was asking for the guy but after yesterday I heard them kind of arguing about kids. I couldn't really hear because it's loud at work. Idk is that weird or am I just over reacting?