You can talk as much as you like that this is the essence of human nature, and try to teach the spouses to treat the fact of cheating calmly.
Anyway, women's cheating has its own specificity.
She is tired of her husband because he has his own life, they live together just because "marriage is a sacred thing." No one loves her, and such a situation depresses her terribly.
In a good way, it would be logical to get divorced, but she will never take such a step because this step is frighteningly serious.
She loves her husband, at least she is insanely submissive to him, but this is all due to the fact that she has a decent lack of experience in amorous affairs.
One talk, one bottle of wine and an easy conviction that sex can be different, and this obedient girl is already in your bed.Instead of that, she is seeking for love on the side, and she tries to make her lover be her new husband without divorce, of course.