The last in a 3-part series of videos featuring naughty Nurse Tobi and starving student Justine begins after Justine answers a classified ad for "study subjects" at the Silence is Prosperity Institute (SPI).  Poor Justine remains at the mercy of Tobi while repeatedly bound in the most stringent of chair-ties and pole-ties with her mouth repeatedly stretched, jacked, packed, and filled with jaw-wrenching gags!  The strain on Justine's beautiful face and the anguish in her eyes is REAL as she endures her discomfort as the study subject of Nurse Tobi - all in the name of "science"!  Unbelievable girl-girl footage from our two most requested models as Justine is repeatedly bound and gagged on-screen before your eyes!