See Janina wearing a sexy black bikini, full weight - smothering her slave in the Smother-Box. This device is made for very bad slaves to keep their faces right where they belong: in the center of a seat as part of it - just to be sat on.
Goddess Xenia has her slave trapped in the smother box - with his hands bound and his head in the box he has no chance but to endure the torture of his mistress Xenia. She sits on his face with her full weight - her legs extended on his body and her gorgeous ass covering his whole face!