Percival hadn't expected Leiland to start crying like that and a part of him felt slightly panicked. Had he taken things too far? Had he actually hurt Leiland or forced him to do something he didn't want? It was only the fact that Leiland was clinging to him like a limpet that kept him from losing his composure. Leiland clearly wanted him there, so he couldn't have fucked up too badly. Emotions were complicated and it was probably just that Leiland was feeling a bit overly emotional after the intense coupling. And that was okay.
Percival got the sense that Leiland hadn't had much of an opportunity to express his emotions in the past. This was a good release for him. So he let it happen, staying still until he needed to pull out, then shifting them so he could lay on his back with Leiland resting on his chest. Running his fingers through the other man's hair, he made gentle, soothing noises, his other hand stroking Leiland's back.
"You're alright, darling," he said softly, pressing a kiss to the top of Leiland's head. "You did so wonderfully. You really were perfect." He continued stroking his hair and rubbing his back and telling him in quiet tones how good and wonderful and perfect he was. He considered using prestidigitation to clean him up, but it would have meant taking his hands off him. And besides, he liked how wrecked Leiland looked.