Sólo Con Tu Pareja (1991)

Synopsis
Tomas is a very busy fellow and is about to grow much, much busier. He has his current girlfriend in bed in one apartment, and his lady boss in bed in the next one, and is crossing from one to the other on a window ledge. Neither one has figured out what he is up to. His juggling act becomes much more complicated when, on one occasion from the ledge between the two apartments he spots his pretty new neighbor. It's only a matter of time before one or all of these women gives him his richly deserved comeuppance. ~ Clarke Fountain, All Movie Guide