One of my coworkers recently came back to work after giving birth prematurely to her baby who only lived for a few hours. She took 6 weeks maternity leave and is now back in the office.

Since she was only in her second trimester, not many people actually knew she was pregnant and I had actually not even spoken to her about the pregnancy. We have different bosses and only see each other in passing and at industry events - although we sit a couple rows away from each other. I didn't know about what happened until after she came back, so I think she may have asked her boss to keep it quiet.

I want some advice on what everyone thinks would be best for her at this point. Should I say something to her giving my condolences? Or should I just act totally normal like nothing happened? I can see the benefits to each because I think she might want to get back to normal as quickly as possible, but I also don't want to hurt her feelings by not giving condolences.