River Lynn has just finished the easier part of her day in the warehouse, training her mind. Now it is time to train her body - more specifically, her throat. Lucas Ayres knows exactly what she needs to be a good throat slut, and he isn’t taking it easy on her. He warms her up with the hitachi, her arms still bound to the metal bar behind her, sliding three fingers into River’s mouth. After denying her orgasm, hitting her tits with his hands and a flogger, Lucas starts to fuck River’s throat with the dick on a stick. He slides it in slowly at first. She can only take about half of the big dildo, drooling already as he starts pressing deeper, making her gag and spit and choke. She’s getting messier and messier, drooling down her chin and all over her tits, her tears streaming down her face joining her spit in trailing down her body. Eventually, when River’s throat is finally ready, Lucas trades the dildo for his own cock, fucking her face, shoving her head down into his lap to make her take every inch. And of course, once River’s finally shown her value as a submissive, she cleans up her own mess, licking up every last drop of cum off her spit-covered face.