My Friend My Lover (1990)

Sabrina Dawn and Alex Horn play a couple who find their relationship foundering on the rocks of infidelity and betrayal. Alex, a born-and-bred Frenchman, finds nothing wrong with open relationships. He likes to dabble with other women. Sabrina does not know what to do about it. They come to an agreement- Alex will play the field all he wants, but so will Sabrina! Will the friends remain lovers?