Rule: Fidelity to the Limit (2014)

Mariana, a businesswoman and Julian, a war photographer have been happily married for many years and have two teenager kids. They are in love and are very successful in their professional lives. They have a wonderful sex life. One day he tells her that she can have sex with other men if she tells him everything in detail. So they try an open marriage, and the situation turns ugly. They wanted total passion, but passions get dangerous fast when new lovers enter and suspicions rise.