Here are some common signs of a cheating spouse.
1) Your cheating husband or wife stops confiding in you and seeking advice from you.
2) Sets up a new e-mail account and doesn't tell you about it.
3) Cheating husband or wife joins the gym and begins a rigorous workout program.
4) Cheating spouse buys a cell phone and doesn't let you know.
5) Sets up a separate cell phone account that is billed to their office.
6) Begins to delete all incoming phone calls from the caller ID of a cell phone.
7) Deletes all incoming e-mails when they used to accumulate.
8) The cheating spouse stops wearing their wedding ring.
9) Suddenly wants to try new love techniques.
10) He/she fairly suddenly stops having sex with you.
11) Supposedly works a lot of overtime, but it never shows up on the pay stub.
12) Picks fights in order to stomp out of the house.
13) You find out by accident he or she took vacation day or personal time off from work - but supposedly worked on those days.
14 Shows a sudden interest in a different type of music.
15) Has a sudden preoccupation with his or her appearance.
16) Spends an excessive amount of time on the computer, especially after you have gone to bed.
17) Your spouse is away from home, either nights or on trips, more than previously.
18) You get calls where the caller hangs up when he or she hears your voice.
19) He/she loses attention in the activities in the home.
20) Your intuition (gut feeling) tells you that something is not right.
21) He/she has a definite change in attitude towards everyone in the home.
22) Atypical erratic behavior.
23) He or she goes to the store for groceries and comes home a few hours later.
*The best telltale signs of a cheating spouse? Having to ask questions in the first place.