While his master's away, a frustrated butler takes his place and interacts with guests.
Brigitte Lahaie cheats on her boyfriend (or husband) with the butler, does some sneaking around to fuck him. The bulk of their interaction starts at around 30:15.
The screenshots above are taken from this nice 4k master 1-minute facebook clip. If you know a full copy of this remaster somewhere, please be a good gentleman and inform us. The VHS copy below is poor, but it will do for now.