This can help:

Cheating women, like cheating men, are all over the place. Even as you read this, there are many women waking up next to guys while their husbands or boyfriends are at home. How do you know if your partner is cheating on you? And what can be done about it?

Many cheating women will leave blatant clues to their philandering out in the open. Sometimes this is because, at some level, they want to get caught. Many times it's just because they're so afraid they're going to get caught, or their new relationships have left them in such a state of bliss that they're not thinking clearly. Whatever the case, cheating women are usually out of the house much more often, for obvious reasons. They might pretend they're getting together with friends or sisters, or they might say they're working late. If they have trouble looking you in the eye when they say this, then you're probably wise to follow up on them. If she says she's at the office working overtime, drop by her office. You can pretend you were just stopping in to bring her a doughnut or something. Or you could try following her. OF course, if she isn't cheating on you your following her could cause some trouble in the relationship.

Cheating women often alter their appearance somehow, for unexplained reasons. And cheating women almost always start acting differently: they'll be either much sweeter to you or much nastier. (Cheating men are the same way.)

When you do discover that your partner has been unfaithful, the best thing to do is call an immediate break in the relationship. Cheating women need space to decide what they really want, and you need space to decide whether or not you can ever trust her again, and whether or not your relationship can move forward. Now, you might be a forgiving person, but it's often unwise to assume that a relationship can survive an act of infidelity, even more unwise to assume that cheating women will stop cheating ion the future. In most cases, a cheater is a cheater, and chances are good that you would be better off finding someone who can be faithful to you.