Brat is suspended and restrained and all she can do is struggling to get her pussy vibed. To make it even harder, a gag tied to the floor is added, as well as a string pulling her back. She's a Brat after all - QualityControl
Look at Ziva's face: she's having a great time, restrained on the sybian and immobilized with segufix. Dressed in pink, she cannot avoid forced orgasm (or denial?)