None of us likes to think of our partners cheating. The idea is enough to make us sick. This is the person you’ve given your heart to. Your relationship is intimate and personal. To think that they could invite a third party in without you knowing is devastating. But, many of us fear the worst when our men change their behaviour. If they start taking private phone calls or go out a lot without explanation; it’s natural to assume the worst. These are, after all, the actions of a cheat.