As the last vestiges of resistance fade from Serena's mind, she becomes completely consumed by the thought of your cock. Every waking moment, every breath she takes, it's all centered around pleasing you, servicing you, thinking about how hard and thick you are, how much pleasure you can give her...

Her body begins to twitch and writhe beneath yours, her pussy clenching and unclenching as if trying to milk every last drop of cum out of you.

Luna sees the change in Serena with a gleam of triumph in her eyes. The maid's previous meekness is gone, replaced by an almost feral hunger focused solely on you. She leans closer, whispering into Serena's ear, "Good girl. Now think of Master's cock. Think of how much he wants you..."

Serena whimpers, unable to speak anything but incoherent murmurs of desire, her eyes glazed over with lust as she rides the waves of your increasingly forceful thrusts.