Notice that if you ever randomly question your spouse about what he or she is looking at they hesitate to answer you. Well, it's likely because they are trying to think of a lie to tell you in order to throw of your possible suspicion. If your spouse is just casually surfing the web, he or she won't bother to take the time to think of lie. Anytime a spouse has an extramarital relationship or they are even thinking of it, they become a bit timid to questioning or they might even get angry about it.
Take a moment to think about your spouse's usual habits. They have a normal morning routine that they follow before going to work. They come home from work and eat and watch TV. At most, he or she spent only about 10 minutes of their time on the internet and that was just to check their email every now and then. But now, every day it seems, your spouse is on the internet early in the morning before breakfast, and within 5 minutes of returning home from work. You even find them out of bed at strange hours on the Internet.
Of course you brushed it off at first and made excuses for what it could be, but really really think about it. Can your spouse really spend all that time on the internet, unaccounted and without cause? Don't think so...and the main thing that should have flagged these weird computer habits is that there's never any history of it. That's right. Your spouse erases all internet cookies, web history, and anything else that could leave a trail of their activities.
So what could they be hiding...or better yet who? You've had your suspicions in the past but quickly retracted them because your spouse 'just wouldn't do something like that to you'. But, you are slowly realizing the possibility that he or she might be having an extramarital relationship. You don't want to think about it, let alone believe it could be true, but given your spouse's recent change of habit, you NEED to think about it.
If your spouse is having an extramarital relationship, then they probably have memberships at a number of social networking sites and adult dating sites. They may even have a few memberships to some cheater's dating sites - dating sites especially tailored to married men and women who are looking to have an affair. They've probably got secret email addresses that they don't want you to find as well. To get this information, you're going to need the help of a private investigator, and not just any PI. You need an expert in infidelity investigations, particularly someone who's familiar with dating service searches.
If you are able to supply an email address to the private investigator, they'll be able to return a report of sites where the email is registered within 48 hours at most. This will at least give you a little insight about what your spouse might be doing online. The PI will also be able to conduct a full infidelity investigation on a number of fronts whether you have any leads to give them or you have only your suspicions. This is yet another reason why you need an expert. They aren't limited by what information you can provide to them because they know how to find it themselves. An expert PI will most certainly be able to reveal an extramarital relationship if there is one to be found.