Nina Takes a Lover
It turns out that the "lover" Nina (Laura San Giacomo) has been flirting with and considering sleeping with is her own long-time boyfriend (Paul Rhys). The couple was just role-playing to spice things up. In the course of this "game", her boyfriend confesses to a previous affair while he was with Nina, causing Nina to leave him. They make up in the end.
Thanks, Morgan B!
(Links open in new window)
Read more about this film at The Internet Movie Database.
Buy it on VHS at Amazon.com.
Buy this poster at moviegoods.com