A sudden change in manner of dress and grooming.
Secretiveness.
Unexplained absences.
Unfamiliar charges on credit card or phone bills.
Hang-ups on your home phone.
More business trips than usual.
Stops confiding in you or asking your advice.
Sets up a new e-mail account and doesn’t tell you.
Mutual friends start acting strangely toward you. (They either knew about
the cheating or have been told stories about what a horrible wife/girlfriend
you are.)
Refuses to let you take him to the airport when he’s leaving town.
Carries condoms even though you are on the pill.
Deletes incoming phone numbers from Caller ID.
Leaves the house in the morning smelling like Irish Spring and returns in
the evening smelling like Speedstick.
Becomes accusatory, asking if you are being true to him, usually out of
guilt.
Raises hypothetical questions such as "Do you think it’s possible to love
more than one person at a time?"
Buys himself new underwear.
Insists that the child seat, toys, etc., are kept out of his car.
Stops wearing his wedding ring.
Supposedly works a lot of overtime, but it never shows up on the pay
stub.
Suddenly wants to try new love techniques.
Has unexplained scratches or bruises on his neck or back.
Has a sudden desire to be helpful with the laundry.
Picks fights in order to stomp out of the house.
Shows a sudden interest in a different type of music.
Has a sudden preoccupation with his appearance.
Spends an excessive amount of time on the computer, especially after you
have gone to bed.
Works long hours on weekends, but is never at his desk to answer the
phone. Then, he calls back later with a reason, such as, "I was working in
the conference room where there is more space."
Has lots of "emergency errands." then comes home empty-handed, saying,
"They didn’t have what I needed."