Am I worried about nothing?

I am in the misdt of heavy wedding planning for our 09/3/11 wedding. My fiance` and I have access to each other's Facebook accounts. Yesterday I looked and notice that he received a email from his ex-girlfriend. He is not friends with her on FB but as everyone know you can send messages to people even if you are not friends. She said Hi Darryl and Fiance`(me) Rick(her brother) is trying to get in touch with you to do some flooring in his store, Now Rick is a friend of my fiance` and asked my fiance` Darryl about doing this 6 months ago and Darryl said since he moved and only had two days off a week it would be difficult to do. My questions is why is his ex emailing him. Should I be worried about this? I'm not insecure however I don't any "opportunities" to present itself that would be a mistake or cause our relationship to end. I did erase the email, however I know he will get a email in account which he will read. He checked his email this A.M. and never said anything to me about it. I know it was wrong for me to do this I should let him handle this himself but I was "disturbed" by the email. What would you do? Leave it alone and not say anything and see if he responds? Or what?