Yes.

Ceres quickly establishes a rhythm jerking your shaft off with her entire body. Meanwhile she stimulates your cockhead with her mouth, opening her jaws wider than you'd imagined possible to take the full girth in her tiny mouth. Drool drips down the full length of your cock, a magical tingling quality making the sensation exceptionally pleasant. As her magical spittal coats your cock and her body, serving as improvised lube, you know she's going to win the wager. With almost a full minute left you erupt. Ceres squeals and tries to retreat, but she's too slow. Her entire body is coated in the sticky white goop in one blast.

"Good girl." You sigh leaning back in your chair.

Ceres looks pathetic, trying unsuccessfully to wipe your cum off of her face and body. "Thank you master." She mumbles. "Will you be sending me back now?" She looks at you with pleading eyes.