Natalie Mars deep down knows Johnny will never leave his wife for her and also knows there probably is no future in her relationship with the married man Johnny she has been seeing. Sure he buys her nice things, and spoils her when they see each other. But as long as he is married she will always just be the mistress. The woman on the side. Johnny surprises her by renting a house for her to live in while she visits LA. It’s their little love shack.