The infidelity thoughts

I still have my fears about infidelity.  I am afraid that the worse case scenario would happen.  The wife would be caught cheating on her husband and she had many affairs, not just one.  I wonder how a woman could do that to a man.  However, I will never know.  Maybe that is for the best.  I will never, ever know.  Getting myself distracted also helps.  Writing things out help me to cope with the obsessive thoughts.  Wow.  It is interesting that I have written my fears down and things have changed.  I have to also learn to calm my mind down.  Why would a person do such things?  How many persons did she sleep with?  That is all the worse case scenario and worst case scenarios can be and are scary.