you're next

A Blonde suspects her boyfriend of cheating on her, so She goes out and buys a gun. She goes to his apartment unexpectedly and sure enough, she opens the door and finds him in the arms of a redhead.
Well, the blonde is angry, She opens her purse to take out the gun but as she does so, she is overcome with grief. She takes the gun and puts it to her head.
The boyfriend yells "No, honey, don't do it." The blond replies "Shut up, you're next."