Do you suspect your spouse is having an affair? Statistics show that most people who suspect it or just have a gut feeling are right. Maybe you need to 
know for sure so you can force them to get couples counseling to try to save the marriage or so you can just get past it or to make a decision on whether to move forward to a divorce.
Although divorce in Colorado is No Fault and evidence of cheating is not required, that evidence can sometimes be leveraged to affect the value of a property settlement or just to convince the spouse to not fight. That evidence can be important to your future economic situation.
It can also affect child custody in some cases.