Of course, this certainly doesn't mean that 2 out of 3 women cheat on their boyfriends or husbands with those men. But if you couple that statistic with the fact that 53% of people will have at least one affair in their lifetime, things do start to get a little worrying.

Here's another statistic for you. Half of all affairs last more than a month. That means that if your wife is cheating on you, there's a 50% chance she's been doing it or will do it for more than 4 weeks/30 days/720 hours. However you put it, that's a long time. So it goes without saying that it's always a good idea to know how to catch a wife who's cheating on her husband, especially if that husband is you.

Let's take a look at the 5 most crucial and critical signs you MUST look out for if you want to have the best possible chance of uncovering your partner's deceit:

1. Routine

For a woman to cheat, 99 times out of a hundred, her routine must change in some way. When you think about it, it makes logical sense. For her to see and be physical with a man other than yourself, she needs to meet up with him either at home or away. What you must do is analyze your wife's daily/nightly routine for changes and then decide the reasons those changes may have occurred. For example, let's say she's making more shopping trips than usual during the week. An honest reason for this alteration in routine could be that it's close to Christmas or a holiday and you need more food. But if you can't find a logical and justified reason for changes in behaviour such as this one, you're right to wonder why. They could be indications she's cheating.

2. Behaviour & Mood

Cheating on your husband can be psychologically stressful. Even though a woman has decided that it's worth the risk to go behind her husband's back, she knows in the back of her mind what could happen if he finds out. She could lose her stake in their house or car, become isolated from their mutual friends, risk the custody of her kids… the list goes on. Always looks for signs that your wife is unusually and inexplicably stressed, especially if she's taking things out on you a lot (this is a way many women make themselves feel less guilty about what they're doing).

3. Digital Betrayal.

As times change, women and men alter their methods of cheating. One method that's on the up is cheating through computers, in chat rooms and via instant messaging software. If your wife is spending more and more time on the computer for seemingly no justified reason, she may be doing just that. Consider checking your internet browser history and chat software message logs/archives for evidence.

4. Physical Evidence.

Finding material signs of deceit is often the strongest way of determining the ultimate faithfulness of your partner. Check drawers, the pockets of clothes before they are washed, and - if it doesn't extend beyond your moral boundaries - the inbox of your wife's phone for illicit text messages and unexplained received/dialed calls.

The fifth and final sign of cheating you should look for lies in your gut. Sit down, calm and collected, and think long and hard about what your gut instinct is telling you. Are you being paranoid? Have you found any evidence yet or noticed any suspicious changes in her routine and/or behaviour?

Combining your intuition with strong signs of cheating such as the ones you've just read is usually the best way of knowing if you can trust your wife to stay faithful to you.