He feels like he might vibrate out of the visible light spectrum watching them both decide on just how to treat him. He's already out of breath and they haven't even started. Gasping sharp at the feeling of Dedue's hand, and those fingers pressing inside of him. A feeling he's very familiar with by now, but it just feels so good.

He wants to be properly surprised at the comment Dedue makes. He can so cheeky when he wants to be. Byleth unfortunately can't formulate words right now, not with the feeling of those fingers probing in, knowing all the best spots, and now his mind is really on Dimitri watching that. Flames. Having him see it and know that he's going to have his turn, too. Shared between them like some marvelous feast. This is actually more than he could ever ask for.

'Horny beyond words' is a turn of phrase but he really is actually, completely at a lack for intelligent comments in the moment. All he can think about is the feeling of both of them pressed against him, knowing he's safe, anticipating such immense pleasure at getting to be with both of them at once.