The betrayal of most people is associated with betrayal, deceit and pain. In stressful moments, the psyche includes protective mechanisms. A person who has faced adultery may experience denial, anger, repression or suppression of negative emotions. Someone suddenly falls ill, demanding increased attention to themselves (this is how psychosomatics work), and someone goes headlong to work, begins to train hard or write poetry (sublimation). While one closes his eyes to what happened, pretending that nothing is happening, the other rolls tantrums.
Accustomed to take responsibility for themselves and others begins to look for reasons in their own behavior. And someone goes the simplest way, blaming everything on the "homeowner." There are families where adultery is familiar. And there are people who are not able to forgive a partner even likes in social networks.