Looking for a very specific video.

I'm looking for a specific vintage porn.
A woman walks in a company/factory, wears a coat. Underneath it she has a dark lingerie. Whole scenario of the movie is like her goal is to fuck/blow every man in this building. She has multiple sexual acts, in diferent rooms, with diferent mans. She is dark haired, middle age, middle height woman.
Dont know name, dont know the tittle.
One scene for sure is in toilet, where she blows one guy and the other walks in and join.