Dominatrix Teases Slave With Her Mouth

A submissive slave is tied up, strapped down onto the bed by his chest and waist. He can still move his arms but he is unable to undo his bonds. He is wearing a tight black leather mask that hides his identity from his superior Master. She runs her hands all over her disgusting slave's body, sneering as as his pathetic little penis grows to an erection. She spits on his cock, contemptuously stroking it while he arches his back, trying to thrust into her palm. Instead, she teases him with her mouth, wrapping her lips around just the head and tickling the tip of his penis and shaft with her tongue. He tries to shove his cock down further.