Friend of the Family

Friend of the Family (also known as Elke's Erotic Nights or simply Elke) is a 1995 drama film written and directed by Edward Holzman, and starring Shauna O'Brien & Griffin Drew.
Plot.
A married couple, Linda and Jeff, are trying to get their relationship under control. They do not communicate with each other much; Jeff is a workaholic and Linda thinks he is cheating on her. Linda and Jeff are both having trouble talking to Jeff's two college-aged children, Montana and Josh, from his first marriage. They then meet Elke, the younger sister of one of Linda's old friends. Elke, who is free-spirited and sexually uninhibited, begins interacting with most of the members of the family, emotionally and romantically, with a new openness and communication between them as the unexpected result.
Reception.
"Friend of the Family" currently has no approval rating on Rotten Tomatoes, but the Want-To-See is currently 62%. TV Guide gave the movie one out of five stars.
Sequel.
In 1996, an unrelated movie called "Passionate Revenge" was released with Shauna O'Brien. For marketing purposes it was rebranded a sequel entitled "Friend of the Family II" directed by Fred Olen Ray (credited as Nicholas Medina). In this movie, Shauna O'Brien plays a femme fatale character named Linda.