Illicit Encounters is the best all-round married dating site, I have been on a few others but the only one I have had any success on is Illicit Encounters. It is quite expensive but that cuts down the competition in my opinion. If you can't afford to pay you can't afford to play!
Pros
Lots of women and men are priced out.
Cons
Expensive
Visit Illicit Encounters Reviews about Illicit Encounters