She's being secretive
She's no longer sharing her daily events with you, and in order to find out what she's doing, you'd have to hack into her BlackBerry because she's not volunteering any information regarding the goings-on in her life.
She places the focus on you
When you do ask her questions, she turns the tables on you. The former chatterbox's batteries have run out, and when you ask her how her night was, mum's the only word. It's now all about you, you, you, rather than "I did this" and "I went here last night."
She showers you with pleasure
Now that it's all about you, your girlfriend is always complimenting you, asking you to go out, giving you "I love you" cards for no reason whatsoever, and even offering to wash your car and watch the boxing match with you. While these gestures are more than sweet, it's this kind of overcompensating behavior that can make one suspicious. If she's bombarding you with niceties, it might be nice to know what's really going on.
How He Might Handle It If He's Suspicious
You have a feeling
If you think she may be cheating, approach her but don't bring up the cheating. Ask her if everything is OK, and tell her that she's been acting different lately. Give her examples of how her behavior has changed, and tell her that you want to know and understand if there's a reason for it.
You want to open the lines of communication and encourage her to open up about what is troubling her in the relationship, and proceed from there. When she's showing the signs you have a cheating wife, approaching her can be a delicate situation.
You have more than a sneaking suspicion
If you have adequate reason to believe that she's cheating on you, do not accuse or threaten her because if you're wrong, she'll feel that you really don't trust her. Rather than exclaiming, "I know what's going on!" or "Who have you been messing around with?" ask, "Is there something I should know?" or "I have reason to believe that you're not being 100% honest with me."
This may seem passive, but you want to approach the topic carefully because if you're wrong, you may be messing up big time. If you're right, however, you have permission to raise hell.
You catch her or have concrete evidence
If there is no way that this is a misunderstanding and you are positive that she's been pawing another dog, approach her with more assertion. Tell her what you saw, how it makes you feel, and what you plan to do about it.
Can you trust her again?
If the answer is no: You can't get back together.
Forgive and Forget?
Being unfaithful in a relationship is horrible, but there is a bigger picture here. You have to realize that a cheating wife may be the result of a problem in your relationship. If she's deceiving you by getting cuddly with another man, it could mean that she is going elsewhere to find what your relationship lacks -- which doesn't make her actions right, but only less despicable. If you discover that she cheated on you, there are a few questions you must ask yourself:
If the answer is yes: It may take time, but you can give it another try. You'll have to tell her that it'll be hard to trust her, but with her help and time, it can happen.
Why do you think she did it?
If she doesn't tell you why: You'll have to evaluate whether you can still forgive her.
If it has to do with your relationship: When you're ready, you can work on the problems in your relationship.
Is your relationship worth another try?
If you can move past her deceit and give her another chance, then when you're ready, sit down, talk to her, and try to understand why she did it. There may be no reason at all (it could just be the fault of stupidity with a pinch of vodka), but if there is a reason why she cheated on you, then ignoring why she did it can lead it to happen again -- and then you'll be cheating yourself.
Once a Cheater...
We all make mistakes, which doesn't make cheating acceptable, but if she shows remorse for her actions and if she's worth the effort of giving it another shot, then you can forgive -- although you may need more time to forget.
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