Lots of clues to find them out:
The marrieds, fiancees, girlfriends all love to tell their husbands they are going out with a girl friend, or going out with womens group, or going out to gym, zoombaa, sick gf, to their moms house, and more.
Big Clue: They are very protecting of cellphone to keep bf or hubby from seeking strange hone calls to their cellphones. Notice that a cheater is always on her cell-phone, never leaves it around, doesn't want BF/husband to see the incoming texts.
Strange calls at strange times.
Marks on their bodies in strange places.
Not allowing marks in special places (can't show the lovers...)
Lots of clues to catch these lady cheaters.
Be on the lookout