What is there to tell, karen? You met a colleague through work, you've exchanged some chatty emails. I do this quite often, men and women who I work with (and I am in a service department) email or ring me and we often have a bit of chat alongside the business part of the conversation. I don't see this as being something worth commenting about - unless you feel is getting something more. Can you not fill the time on your hands so you are not tempted to contact him? I suspect your feelings of guilt do relate to your ex's hangups, not your husband's. If you treat it as a daily thing rather than something special, it would look to me like you are keeping it in perspective. Make sure the guy realises you are not available though, it's too easy to give the wrong impression on email! If you confine your emails to the odd lightweight chat, nobody will be upset.