I am really, rather terribly attracted to a guy from work.. he too does give subtle hints... I am a mother of a 4 year old with an amazing sex life with my husband but my mind still wanders.. And I can't control it... Any reason why this is happening-I must add here that I am very happy with my married life yet feel like straying-Pls advise

You need to look within. Are you not getting fulfilled by your husband, are you bored at Work? There's nothing wrong with finding somone else pleasing to the eye - after all, this is 1000s of years of human evolution - but this should be nothing more than window shopping. Or you risk losing EVERYTHING for what will be a meaningless bit of fun. Take a look on the mirror and think very carefully about next steps. And be prepared to accept the consequences, whatever you do.