Farrah Abraham GRAPHIC SEX TAPE PHOTOS

5/1/2013 12:45 AM PDT

Farrah Abraham -- GRAPHIC SEX TAPE PHOTOS

EXCLUSIVE

This just got real ... TMZ has obtained graphic images from Farrah Abraham's upcoming sex tape ... and they're way gnarlier than we expected.

The 21-year-old "Teen Mom" star initially denied there even was a XXX tape -- but came clean about its existence last month, after her co-star James Deen blew the lid off her little plot.

As we reported, Vivid Entertainment paid Abraham in the high 6-figure range (nearly $1 million) for getting down and dirty on camera ... and boy does she get dirty ... the pics are intense.

The tape's now called "Farrah Abraham: Backdoor Teen Mom" ... and you can guess why.