Two Way Mirror(1981)

Original title: Garçonnières très spéciales

Used as a rendezvous for illicit lovemaking, two Paris apartments have a devilishly deceptive TWO-WAY Mirror installed between the bedrooms. Let's take a peek at what goes on when a married couple inherits a key to each separate love nest...without each other's knowledge. What you see is what you get in this passionate saga of lusting spouses that's worth looking into!