If this man doesn't have a history of doing this sort of thing, the fact that it was just those two in the Office, and if he completely denies doing anything of this nature....Does she have a case? Are there not cameras in the office building?
IMO, it sounds like she's making this whole thing up....it just sounds to much like something straight out of a porno, without the Gangbang, Rodeo Clowns, Midgets, and Donkeys.