Friday Plot Swap~Double Life Style

Friday Plot Swap

Dawn's Plot Swap
Have a plot? Leave one
Need a plot ? Take one 
A good mystery always has a twist. A popular version of this is the character living the "double life".  The perfect wife and mother turns out to be a government spy.  The all-American husband turns out to be a psychotic killer. So, today, let's talk about the double life.
Here are some examples I have for you: 
So, swap with me! 
What is your favorite "double life" plot?
If you were going to lead a double life, what would your other life be?