All right, so I remember very little about this movie, and the parts I do remember are slanted by my sexual depravity as the 13 year old boy I was when I saw it. So, if anyone out there can figure this out from this barely remembered scene, I'll be floored. Here goes:

Sex scene (of course). Guy and girl laying together, girl heads down (off screen) and the guy lights up a cigarette. Next scene, the girl is looking out the window with her back turned to us, something happens (sorry), and she flips around revealing all and kills something (again sorry). She then covers up after her cronies show up (very casually, not worried about her nudity) in a black (I think) T-shirt. Next scene is a classic march shot of them walking towards us all bad *** with their guns through the outdoor hallway of the hotel/motel the girl front and center and a cronie on either side. Good luck!

I think the movie had something to do with androids or cyborgs or some other form of robotic humanoid thing and it was all shot in that really cool gritty version of the future, (road warrior, etc.)

Remembered a bit more: The girl was a brunette, longer hair. The movie had to have been done sometime between 1985 and 1995.

Yeah the girl was hot! ;-) The movie is called "Hardware" and can be found here:

Hardware (1990) (http://www.imdb.com/title/tt0099740/)

*** Radiation clouds choke the sky and over-crowded mega-cities threaten to dissolve into madness. A wandering junk merchant finds the remains of a defunct robot and sells them to Mo, also a nomad, who buys them for his urban artist girlfriend named Jill to use in her work. But he doesn't know the robot is a self-regenerating prototype, a military drone intended to control the exploding population utilizing indiscriminate, gruesome murder. Trapped, alone in her apartment and spied on by her perverted neighbor, Jill must battle to survive against a relentless killing machine re-built from her own possessions and which will stop at nothing to tear her apart. ***

It's Nemesis (1993) (http://www.imdb.com/title/tt0107668/)