A fun predicament: Simply keep your back arched and you'll be able to breathe, but as you tire and lose your arched back posture, you'll choke yourself more on your chained collar and have more of his cock down your throat
A good girl knows that even if she's suspended upside down, blood rushing to her head, and being pleasured by a vibrator, her responsibility is to suck any dick put in front of her, and to suck it well
