Changed username for this because worried it's outing.
DH has a woman at work who clearly likes him, he doesn't ever name drop at home or anything like that, absolutely not worried anything is going on with them, but it's quite well known at work she has a crush on him and he knows it too.
I have previously asked that he doesn't engage in any texting with her. She has texted him before and been quite over friendly in my opinion, he has never reciprocated to my knowledge and when I have seen their texts he just used to reply very succinctly and only to work messages. No kisses or anything. However I personally feel that they shouldn't need to text at all, yes they work together but any of these conversations could be occuring over work email.
Since lockdown she has been texting him quite a lot about work stuff, I wasn't actually aware of this until I saw the texts recently, lots of texts from her all about work but she is trying to be chatty with him. Annoyingly he has been replying to them all. Yes he is blunt and it's about work but AIBU to be annoyed he is replying to them when we have already discussed this and he agreed he wouldn't? Or do I need to calm down as they are just about work?