The Bloom of Yesterday (2016)
A husband calls his wife on the phone while she is having sex with another guy in the shower.
Actors: Rolf Hoppe
Palmetto (1998)
A wife and her stepdaughter hire Harry to fake the stepdaughter’s kidnapping. Both meet him on separate occasions. Both also seduce him during those meetings but he only screws the wife because the stepdaughter is underaged and he doesn’t want to go to jail.
Eine Liebe in St. Petersburg (2009) aka A Love in St. Petersburg
An already engaged Berlin anesthetist falls in love with a Russian pediatrician.