Swinger Club (2006)

For their fifth wedding anniversary, Albert and Birgit have a party for their best friends in their house in the countryside. But the party becomes a very dangerous event. Unknown involvements arise and lead to the destruction of friendships. Birgit slept with Albert's best friend, but Albert doesn't know about it, yet. He only noticed her coming home very late and freshly showered. Suspicious, his main reason for inviting his friends is: Do I have the right to know what happened with my wife that night? Birgit doesn't want to tell him because she only spent the night with another man to give their boring marriage a new impulse. And it worked well.