Should I be annoyed??

So im 18 weeks pregnant, we’ve just got our new house and are in the period of moving from one house to another so it’s been stressful as it is! I noticed my partner has been messaging this girl from work... she’s very pretty. I know full well 3 guys from their work are trying to crack on with her and I know all the guys talk about it all including my partner as he tells me about it all. But the conversations between him and her are a bit too friendly and if they ask each other to do something for them at work or even when one of them isn’t at work they will send the 😘 face? My partner is the one instigating the messages and seems to be a little flirty? Should I be annoyed? Ovbs I’m super emotional about it because I know if I did something like that even if it was harmless he’d throw a fit! What should i do?😔 I don’t want to cause yet another argument but it’s really upset me because she’s not exactly ugly 😔😢 feeling very insecure right now 😔

One of the messages he sent her while at work was I’m hungry bring me food 😘 she then said get your misses to cook you something and he’s reply was yh but you owe me 🙄