Underworld: Evolution (2006)
However, because of these reasons later part of the scene where Selene is on top of Michael and they continue to have sex until she has another orgasm couldn't be re-edited to look properly which is why it hit the cutting room floor. But if the later scene where Marcus stabs Selene and starts drinking her blood and seeing her memories is slowed down (this scene takes place about an hour into the film), one or two single frame shots can be seen which show bit more nudity from Selene and her starting to get on top of Michael. These shots were part of original sex scene and were accidentally left in during editing of the film.
Director Len Wiseman did said in commentary for theatrical cut of the film recorded in 2006 how there were some scenes that were deleted from the film and how there might be an extended version of the film released sometime after DVD release, just like one that first film had, but that never happened. He also mentioned in some interviews at the time when movie was released in theaters how original cut almost got NC-17 rating, mostly due to the level of violence and gore but it was also hinted that one of the other reasons why original version of sex scene between Michael and Selene was cut down is because that scene alone would probably earn the movie NC-17 rating.