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

It can happen. Attention never feels bad. Mind goes stray but I think you should not give into this new attraction in your life. Till you don't get anything, only then you are attracted towards things and people. And in this case, if you take forward your liking for this guy, your happy life will soon become thing of the past. Trust, such relationships only make life complex and in the end ugly. If you are 'terribly' attracted to this guy, I suggest you change your job if it is possible, else you may end up messing your life.