EXCLUSIVE
So much for V. Stiviano's claims she was NEVER Donald Sterling's girlfriend ... her own court documents say she was a prop to show off the Clippers owner's "sexual prowess."
TMZ broke the story, Stiviano has been denying she was ever Sterling's girlfriend -- telling people she was simply his "archivist" for years and things never progressed beyond work-related interactions.
But Stiviano says the opposite in new court docs -- claiming she's been Sterling's sexy sidepiece for 4 years, much to the mortification of Sterling's wife Shelly.
The documents -- filed this month in connection with Shelly's lawsuit against V. claiming she duped Donald into showering her with more than $2 mil in gifts -- say the relationship between V. and Donald was "neither [a] hidden, closeted, nor a clandestine 'affair' at any time," adding it was "open notorious, obvious and long standing."
Translation -- if they weren't banging, it was a hell of a performance.
