Mistress tortures her slave's cock in a chastity cage until he cums

The true torment for a slave: the steel chastity cage encases the slave's cock, he's spent far too long in that instrument of torture. The mistress has a few tricks up her sleeve that will drive her rubber slave even crazier. The dildo teases his mouth, coming too close to his real cock, which is almost exploding inside the cage. Even when her mouth reaches his cock, it's not enough to make him come. This heartless mistress will even unzip her crotch to fuck that helpless cock. Only at the end will the slave find out if he'll get his orgasm.