Hi, this is my first post here, i am sorry for not so well english. A long time ago i remember watching a film which name i cant remember. It was 70s 80s film i think and was in german if i am not wrong. The film starts with a couple meeting two young hostess at the airport exit. The girls seems to be the wife's sister's/brother's daughters. They go home and the couple starts having sex in the office while the girls spies them and they do lesbien sex in there room. Then the wife quits and the girls do sex with the man. Meanwhile, the wife do an accident with her car. He brings two men in the other car to the house and quit with one. 2 men and 2 girls do sex in the house. Wife goes to a female friends house where they start a threesome. In the final the wife her girlfriend and the other stranger joins the 4 people in the house. Does anyone remember that film and its title. Thanks in advance.