If marriage counselling or divorce proceedings sound like a chore, suspicious wives in China have an alternate method of dealing with a cheating husband. Behold, the so-called “mistress dispeller”: a woman who goes undercover to break up the affair between a wayward man and his secret love. It sounds like a kooky invention, but it’s a real booming profession – just as long as you’re rich and live in China.In a new documentary,