DH had a work colleague who he acknowledged fancied him - she used to make cookies etc just for him, weird stuff like that. However he said he spoke to her about unprofessional behaviour and has little to do with her in the office. She has since moved teams and I thought nothing of it. Stumbled upon an exchange of emails between them today on work email about a business deal. They did not work on the deal together and the entire tone has left me feeling cold - VERY playful and I just can’t understand why he started this dialogue with her, this bantery, fun work dialogue with someone he is no longer working with and who he apparently never spoke to at work?!?