Schamlos! Diese Untermieter (1970)

Claudia is supposed to remain a virgin until the wedding, but when the new trio of lodgers move in with the Neumanns, this situation quickly changes. This trio really knows how to get everyone in the house involved in their fucking games. Mr. and Mrs. Neumann are getting into other people's beds more and more often and Claudia finally gets to enjoy a decent hour of sex. But she has come up with something special for her deflowering lesson.