He slid his hand along Mark's thigh, then up Ting's to wrap around Ting's waist. He helped their boy come the rest of the way down so Ting was sitting on Mark's hips. Ting smiled, the look dear, warm and perfect.
"Now ride," Grant ordered, his fingers tightening on Ting's hip.
"Yes. Yes, Master." Ting began to move, sliding up and down on Mark's prick.
Mark undulated as well and Grant could feel it, feel his boy undulating, sliding against him.
smut fixes everything