He's actually pushing back against his hand. It takes Jade by surprise, and he swallows, stilling for a second. Then he keeps grinding against Heine, a little faster than before, a little more insistent.

This is different from the blowjob, he reflects. So far, it doesn't feel as good, but it's less awkward in some ways and more awkward in others. Mostly, he wishes that they had their clothes off. His arousal is doing a good enough job of keeping him warm.

Again, he stops, but this time there's a purpose to the sudden pause. Carefully, he tries to tug the sweatpants off of Professor Rammsteiner, at least far down enough to bare his cock and thighs. Professor Rammsteiner hadn't seem to take well to being exposed last time, so this time, Jade goes slowly, not making any sudden moves.