Encourage him to continue

"Don't stop on my account, farmboy." You say, uncrossing your arms and stepping forward. "To be honest, I was enjoying the view."

Luke stares at you, dumbstruck, his arms falling away from the pillow and leaving his erection to spring up and flip it off his groin. His cock sways there, spit still running down the length, the tip twitching with want. Luke takes a deep shuttering breath, and then raises his hand back to his cock, and begins to stroke.

You drink in the sight- he's very aware of you at first, squirming under your gaze, but as his pace picks up and soon he stops being bashful, moaning and gasping, his toes curling at the end of the bunk as he beats away. You where hard before, but not you're iron heavy in your pants, imaging those lean fingers on you, or better yet, the feel of that tight ass that keeps bucking up and down onto the sheets. A good framboy like him? Probably virginal and ripe for the taking.