Mistress Tess is building Her sissy slut up ready to earn money for Her. Before this sissy starts earning though Mistress Tess needs to make sure that the service that it gives is up to standard, after all what good is a sissy slut if they can't suck a cock to orgasm? Will this sissy slut pass the test and make the practice penis blow a load or will the sissy need to go back to the shame of practicing on a dildo?