All of us manipulate the people we interact with on a daily basis to achieve certain ends. Some do it without even being aware that they’re doing it. Some know what they’re doing all too well.

From The 48 Laws of Power by Robert Greene:

Law 2: Never put too Much Trust in Friends, Learn how to use Enemies

Be wary of friends-they will betray you more quickly, for they are easily aroused to envy. They also become spoiled and tyrannical. But hire a former enemy and he will be more loyal than a friend, because he has more to prove. In fact, you have more to fear from friends than from enemies. If you have no enemies, find a way to make them.

This challenge is to write a story regarding either the observance or the transgression of this law.