[ Iorveth is only aware of how Astarion sounds when he's with him, which means that he's more than enamored by that whine-groan. It's proof that Astarion is enjoying himself to some extent, and the positive feedback is reassuring when Iorveth considers the enormity of the baggage that Astarion has to carry with him at all times. Even now, despite everything.
So Iorveth returns the sentiment with a sound of his own, a wrung-out cry when he feels Astarion's firm grip around his cock, bringing him close to an edge he's already on the verge of falling over. He's too busy concentrating on not coming immediately to see how red the flag waving in front of him is, with that "say you're mine".
Again, it's the kind of behavior that shouldn't be rewarded. People only belong wholly to themselves and the choices that they make, and－ ]
－Yours, [ Iorveth huffs. He chose Astarion, and he only wants Astarion; sex brain says that that's close enough to being Astarion's. They can philosophize later over the details. ] Only you, Astarion, I only want－
[ The rest of that sentiment is garbled: he shakes, clings, and finds himself coming prematurely, far faster than he intended, making a mess of Astarion's hand, of their stomachs. It can't be comfortable for Astarion, how hard he clenches around him during his orgasm, but it's wholly out of Iorveth's control. ]
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So Iorveth returns the sentiment with a sound of his own, a wrung-out cry when he feels Astarion's firm grip around his cock, bringing him close to an edge he's already on the verge of falling over. He's too busy concentrating on not coming immediately to see how red the flag waving in front of him is, with that "say you're mine".
Again, it's the kind of behavior that shouldn't be rewarded. People only belong wholly to themselves and the choices that they make, and－ ]
－Yours, [ Iorveth huffs. He chose Astarion, and he only wants Astarion; sex brain says that that's close enough to being Astarion's. They can philosophize later over the details. ] Only you, Astarion, I only want－
[ The rest of that sentiment is garbled: he shakes, clings, and finds himself coming prematurely, far faster than he intended, making a mess of Astarion's hand, of their stomachs. It can't be comfortable for Astarion, how hard he clenches around him during his orgasm, but it's wholly out of Iorveth's control. ]