Blind trust
What would you do if you found out omeone very close to you betrayed you? What if you found out someone very close to you has been disloyal, unfaithful, or had wronged you and hid that fact? Would you confront that person, knowing that you would destroy each other, or would you just stick your head in the sand and try to forget about it and hope it was just a fluke? Yuck, this sand tastes nasty!
What is your definition of faithful or loyal? I'd be interested in hearing it, because I am sure it is different from mine.