Four hour Carrara mask Challenge

Tall dancer girl Britney returns, and she is always full of confidence. She did in chastity before, and this time I have a very special Challenge for her.
Locked in full chastity (bra and belt), Britney curiously holds the locking Carrara mask in her hands when I approach her. Much to my surprise, she has put on a flimsy school girl outfit OVER her chastity outfit. ‘Do you like it?’, she asks when I comment on the silly outfit. No, I don’t. I tell her to take it off so we can see her chastity belt and chastity bra. And her collar of course. Britney looks amazing in chastity, she always does. Her super long legs are somehow even more sexy when she wears a chastity belt.
I tell her that she will be locked in the Carrara mask for 4 hours in order to get her prize money today. Britney laughs and says: ‘Bring it on! I have got this Challenge!’. Moments later, when the mask is locked on, she is still full of confidence. The mask is so tight on her cheeks she can barely speak. The chin rest can even close her mouth a little more by turning the screw underneath, but I leave it for now.
This mask is a lot of fun! It is face chastity basically. Chastity Babes can not do naughty things with their mouths while locked in this mask. They can’t eat either (which keeps them in shape for their chastity belt). There is a secondary lock so the mouth cover can be removed. It is now a grill, but it can be replaced with a solid plate if needed. I am sure I will do that in the next four hours! The mask locks with a single lock on top of the head. Both padlocks can be different, so the girl can be allowed to remove the mouth plate but not the entire mask.
Britney is so full of confidence, she needs to be taught a lesson. In this case, the lesson will be: four hours is longer than you think!!