Velma Fucked By Ghost

It's been a long day of searching but the gang hasn't turned up any clues in the mysterious haunted house. Velma calls for bed, and that night is visited by something she can't believe. Waking her in the night, an invisible spectre fills her unsuspecting hole. Grasping wildly for her glasses, Velma is both shocked and aroused as she discovers there's nothing there. Nothing but....ectoplasm?