should I have sex with my ex

I decide to remove the picture..because some of you didn't like it.. and wasn't nice at all.. so should I have sex with my ex..  I am married and have a son.. he been texting me for the last 2 months he even text me a picture of his dick and that remind me how damn good was the sex.. I love my husband, but sex isn't good.. and now that my ex remind many stuff.. I don't want to be unfaithful.. but in my deepest wishes I want to have sex with my ex.. guys I know shouldn't be asking this but should I or just leave it alone??