Obedient slave under Mistress' chair opens mouth wide and submits

On Halloween night, an obedient slave, tied to Mistress' chair, waits for his Goddess. She comes and lightly whips him, makes the slave clean her high heels. Goddess sits big ass on the slave's face, making him moan and twitch before letting him inhale. Mistress pushes her bare toes deep into the slave's mouth, gagging his mouth and trying to push foot deeper into his throat. But this does not satisfy her completely, since she suppose that the slave has not opened his mouth wide enough. So Goddess put a mouth expander into slave's mouth. She spreads his jaws as wide as possible, so that the slave can no longer close his mouth without her permission. She spit in slave's well-fixed open mouth. The Mistress continues foot gagging the slave's fixed mouth in different positions. Having played enough with the slave's mouth, the Mistress puts on her mules and uses the slave simply as a footrest, and the shoe slowly dangles on her foot above the slave's face.