I receive a lot of questions from men on how they can figure out if a woman is cheating or if she's a cheater in general. Women can be very skilled at covering their tracks (in all fairness men can be very skilled at this as well) because they tend to lack the goodwill conscience as the foremost basis as to why they choose to cheat in the first place.
If she's cheating on you she's likely already checked out of the relationship long before the cheating ever started. Meaning she wasn't really present in the relationship at all or she may have checked out for reasons that may or may not be apparent. Women rarely switch gears too quickly–they like to stay put with the man they adore.
Women typically only cheat if they're not in love with a man. And mostly, when their needs aren't being met emotionally or sexually. There are some cases in which certain women won't be able to curb their cheating because it's simply a part of who they are e.g. no amount of validation on your part or anybody else's will satisfy her need for attention and approval from men.
In any case, there are some distinct signals women tend to display when they're cheating: