As soon as Vyan and Iyana manifested in her tent, she pulled her hand back from him like she'd touched a hot coal, turning away with a cold, "Leave."
Vyan knew exactly why she was upset. He could read the guilt on her face—the weight she carried for bringing danger to him through Sienna. All he wanted was to free her from that burden, but in his clumsy way, he ended up saying something painfully insensitive.
But the truth often is. There was no way their feelings could be mutual. He wasn't in a position to fall in love with anyone, and she... well, she was already engaged to someone else, even if her heart wasn't in it.
Still, hurting her was never his intention. He only wanted her to feel less guilty, to understand that Sienna's actions weren't her responsibility. Sienna chose her path, and no matter what her motivations were, the blame didn't lie with Iyana.