Use the boobs

Duke sat on the edge of the bed, and stripped below the waist, letting his erection fly free.

"Boob Bot," he instructed. "Use those boobs of yours on me."

"Affirmative." Yang droned. She shuffled over to him, dropped to her knees, and wrapped her tits around his dick.

She moved them up and down his cock in a stiff, robotic manner, but it still felt good.

Emerald, meanwhile, had recovered and was beginning to stir.