The noises from Jonas are unbearably hot and Rupert's only to happy to lift, to nudge, to press with his thigh with great purpose now that he knows Jonas has the right idea. He has some hazy, half-formed notion of Jonas rubbing himself off on his leg, frantic and needy as he is, and Rupert's hands slide a little further round to hold fast at Jonas's arse through his pants. Encouraging him to grind, to fuck himself against Rupert's thigh however he wants.

Rupert's hard in his own pants but moving - to take them off, or peel them away and free his cock - or bearing Jonas's weight in his lap for mutual grinding both sound potentially painful. So he works around it, happy to ignore his own erection for now in favour of this mindless grinding and breathless kissing, with Rupert matching those frantic noises from Jonas with deeper groans of his own. He wants to say something filthy, something to let Jonas know exactly how wanton he sounds, but Rupert has a sneaking suspicion the other boy just might self-immolate via blushing if he tries it. Better to not and to focus on just this for now.