This is a scene by itself, but was also originally intended to be merged with Layla giving a smokey Blow job. The intent was to make it look like Mary Jane was sitting there watching Layla. Both were smoking, but Layla was also busy with a dick, where as Mary Jane was just busy being herself, watching and absentmindedly playing with her pussy.

You can also see the set up and beginning of the scene, which was shot in one take, from a tripod, with MJ sitting open legged before you.