Unless you're talking about the various "cumming and then back to fucking" threads, then the answer to my knowledge is no. If the scene has been shot and the movie has finished, what could come next? It's over at that point.
I know in gangbang scenes where every guy doesn't necessarily cum it's relatively common for the girl to take care of the guys who didn't cum after everything is over. Usually, though, that just involves a quick handjob or something. Again, though, anything to this effect is really just something between the people involved and not something that is going to go out on a final DVD.