Re: Suspect my wife of cheating...
I agree with the common suspicions in all of the replies due to the red flags. But I think a more low key approach may be called for. It is entirely possible nothing is going on, and I think it is possible she is maybe feeling some dissatisfaction in her life and perhaps seeking some independent girl time with female friends.
Like the member here who read his wife's diary and discovered she is unhappy but not in an affair, this may turn out to be an innocent and very positive turning point in your marriage.
Still, it is wise to be alert and to not ignore possible warning signs. I like the idea of doing some research. Definitely check the cell bill going back 12 months. Get some history and trends. Is there a recent spike in text messaging? Is she making calls to one number a lot, or at odd hours?
Check her phone for chats, messages, and apps.
A keylogger on the computer makes sense.
I would not VAR her car yet because it doesn't seem like there is much cause. If she were to find out about it, the downside is pretty big. So I would wait on this one myself.
I would find a safe time to carefully search her car. Look under the seats, in the various pockets and bins, behind the sun visors, in the glove box, inside boxes and envelopes. Just to see if there are any goodies like condoms or a second cell phone.
Similarly search her purse. Be sure to put everything back precisely how you found it!
This is a good opportunity for you to do a little self examination to see if there are ways you can improve yourself. Not because your faults would be to blame for her stepping out of the marriage, but because we are all imperfect. Maybe you can eat healthier, get exercise more regularly, and improve your wardrobe some. Maybe you can turn off the f'n tv and have a real conversation with your wife at dinner time.
If there is nothing untoward going on between your wife and this guy, any improvements you make can only help. If she has already started sleeping with the entire local sports league, your improvements will serve you well in your next relationships.