I saw this movie around 2006 on On Demand in the free movie section.  It is a space movie where the crew awakes from Hypersleep and an alien has gotten on board.  The alien is sexy and fulfills the crew’s fantasies.   Soon, the alien pits one crew member against the other and they slowly kill each other off.  I also remember a really long fight scene where two friends beat the hell out of each other for what seems like 20 minutes.  Cut to the ending, one of the crew escapes only to realize the evil sexy alien woman is onboard.  I wouldn’t say it was a softcore porn, but, close.