Yet isn't that the for Lan Xichen to stand by Jun Guangyao?
His throat moving in a swallow, Ah-Yao glances at him in a way that seems almost shy. His hand trembles.
Ah-Yao stills. "I cannot. I cannot risk," his voice drops to a whisper, "your scorn."
Lan Xichen puts a hand on his shoulder and tugs until he turns to face him, though Ah-Yao's eyes stay on the ground.
Eyes flying open, Ah-Yao says, "Really?"
"I have tried to be content to be your friend," Lan Xichen says, feeling heat creeping under his skin. "I have tried-"
"But I've always wished that - that you felt the same," Lan Xichen admits. "I knew you didn't. And then you were married, and-"
"And the Lan Clan rules warn against violating the sanctity of marriage," Ah-Yao says sadly.
He's stopped by one zither-calloused finger pressing against his lips.
"How could I not want you?" says Ah-Yao, smiling up at him through the tears in his eyes. "How could you believe that I wouldn't desire someone like you? The most beautiful man I've ever met?"
Lan Xichen moves at last. His head tilts forward, his lips find Ah-Yao's, his hands move to pull the other man close and cradle him against his body. "Ah-Yao," he gasps, "Ah-Yao."
All restraint comes crashing down. Lan Xichen kisses him hungrily, even frantically.
Lan Xichen watches, desire curling into every limb.
Hastening to reassure him, Lan Xichen yanks off his outer robe. "I want."
It makes him feel like a youth again. "I haven't."
Lan Xichen shakes his head, feeling the heat rising in his face. "Not with anyone. There was never anyone else I wanted," he confesses.
Ah-Yao's eyes flicker strangely, possessive, triumphant.
"Don't speak of yourself so," Lan Xichen chides. "You are brilliant and beautiful and wonderful."
"I do," he says.
"I-" Lan Xichen, "I told you, I've never," he stops and takes a breath, reaching for his equilibrium.
"Then, may I tell you what I want?"
Lan Xichen blinks. "Have you done this before?"
A-Yao hesitates, dropping his eyes. "I-yes. I have."
"It was long ago," says Ah-Yao quickly, "before I was married." He looks away again, his voice going quiet. "It wasn't like this. It was something I had to do." He bites his lip.
"But now I'm glad," Ah-Yao says, his smile becoming more genuine. "It's just as well that one of us knows what to do, isn't it?"
"I want you to take me as you would a woman," Ah-Yao says, and the hard-won calm flees. "I want to join our bodies and become one."
"It will not," says Ah-Yao. He rises from the bed and slips out of his under robe, which slithers off of his shoulders and pools on the floor like water.
"Where are you going?" Lan Xichen winces at how plaintive he sounds.
"I need to make a few preparations." Ah-Yao moves to stand before him again, then leans in for a kiss.
When they part at last, Ah-Yao says gently, "I'll be back soon, my dear."
He wonders if he should be ashamed. There are no Gusu Clan rules against this. Against violating the sanctity of marriage, yes. But not this.
But is it not a betrayal to Ah-Yao to suspect him?
It cannot be true.
Why does he find himself so reluctant? He could search for evidence of Ah-Yao's duplicity right now.
Instead he waits.
Lan Xichen can only nod.
Ah-Yao catches his wrist.
It's equally strange to see Ah-Yao without his omnipresent hat, with his hair loose around his face. Gently pulling his hand away, Lan Xichen undoes the headband. Then he reaches up and winds it around Ah-Yao's forehead.
Lan Xichen can't speak around the lump in his throat. If only he could sweep Ah-Yao away to the Cloud Recesses, to hide and protect and care for him there.
And yet, he's happy.
"Thank you for accepting it," Lan Xichen says, his voice rough.
Ah-Yao beams at him. "Lie back for me." Lan Xichen nods and lays back, turning his head to watch. The robe slithers off, leaving him naked and lovely.
There are fewer scars than he'd expected. The remnant of a small burn on Ah-Yao's shoulder draws his eye. "This is from when you rescued me."
"Only you," gasps Lan Xichen. His hips move on their own, desperately thrusting into Ah-Yao's grip.
Ah-Yao lets go, drawing a different sound from his throat, then slides up and sinks down, sinuous as a snake.
"Yours," Lan Xichen says brokenly. "I'm yours, Ah-Yao."
Ah-Yao closes his eyes and arches back, spattering Lan Xichen's stomach and chest. The small body atop his tightens around him, making him writhe.
Lan Xichen shakes his head. "I liked watching you," he admits. Ah-Yao laughs again and lifts himself up, then down again.
The first surge takes him by surprise, ripping a cry from his throat. It feels pulled out of him, too intense, too much, too sweet.
Endless.
Finally it releases him. He collapses with a groan, weak and empty.
His qi has been drained completely.
Ah-Yao looks down at him. He is not smiling.
A numb acceptance steals over Lan Xichen. He's not surprised.
"Now you don't have to choose," Ah-Yao says.
A feeling breaks through the blankness: relief. He won't have to fight his brother. He won't have to take a side. Gratitude wells up as well. He closes his eyes against the sting.
"Thank you," he says softly.