Males - two truck drivers. One is the main character
from 22cm oder einige Erlebnisse des stellungssuchenden Gerd M. and the other one the stepfather in Josefine Mutzenbacher ... wie sie wirklich war 1. Teil.
Schwester Maria (Patricia Rhomberg), who is a hitchhiking nun, is picked up by two truck drivers at an Autobahn parking lot. In the loading area she discovers some vegetables and slips a cucumber into her cunt. Then she's fucked by one driver as the other one picks up another hitchhiking girl.
This one (XNK3331) bares her breasts while he starts wanking, but when he wants more she refuses and gets off at the next parking lot.
Then the drivers have a threesome with Patricia. A third girl (XNK3332) joins them and the four finish the action on the platform.