Changes in the way a spouse talks and behaves may be signs of cheating. He may say that he loves his wife but he is not in love with her. He may say that his new female pal is just a friend but they spend a lot of time alone.
Spouses who suspect cheating should pay attention to big changes, such as hiding cellphone records, setting or changing computer passwords, or setting up new social networking profile. A strong warning sign is accusing his spouse of snooping or trying to control him if she asks questions about the changes.
Behaviors that counteract what he says may indicate cheating. For example, suddenly being unable to account for time or money are suspicious. The wife may catch him in lies about little daily details. Before confronting him, the wife should do some further investigation to get proof that her instincts are correct.