Chapter Text
Lan Xichen had never considered himself a jealous person. But to watch Wei Wuxian crowd close into his brother’s space, smile so wide at him with sparkling eyes - well, it’s not that he could say it sent him into any sort of public frenzy, but his actions were no longer rational. It was not rational when he slipped into Wangji’s room under the cover of nightfall. Nor when he helped his younger brother out of his robes, allowing his hands to linger on the line of his throat, having the boldness to ask Wangji if he liked Wei Wuxian.
Of course, Wangji just shook his head, “no. Shameless.”
Xichen laughed, hoarsely. It was definitely not rational when wrapped his arms around his little brother’s waist and tucked his nose into his shoulder. Wangji fell back easily against his chest, too easily. When he took a breath, it was a shudder through his entire body, rising up his throat raggedly. Xichen moved his hands lower.
He smoothed over the silky fabric of his robes, the inner ones, as Wangji was stripped to all but one layer. Across his waist, his hips, and into his lap. He was hard. It was unmistakable, and it was Xichen’s turn to inhale sharply.
“Wangji…” he murmured.
As always, his little brother did not speak. He simply let his head loll back onto Xichen’s shoulder.
Xichen tsked, “are you thinking of him?”
Silence, for a moment, but he knew well enough to let Wangji think. “No,” he said finally. The answer made Xichen pleased. It was shameful.
“Wangji,” he breathed, again, this time against the back of his neck, “what is it you’re thinking of?”
Another long pause. “You.”
A part of Xichen wanted to tear his little brother’s robes open, to touch him, jerk him off, press his fingers inside him. He swallowed the desire down, and directed instead, “touch yourself.”
Wangji hesitated. His hands twitched where they were resting on his thighs. But, after a few seconds, he obeyed. He parted his robes neatly and gave Xichen a full view down his frontside, his slim chest and the curve of his cock, dark now with arousal.
He moved his hand towards himself, but Xichen caught his wrist in his own hand. He lifted it to his mouth and spat into his palm. He did it without thinking and did his best to hide the way his own actions were causing his heart to race. Wangji said nothing, just watched him out of the corner of his eye until he released his wrist. He moved his hand back to his cock, and no one but Xichen could have noticed the way he trembled.
He hesitated another second, fingers only lightly touching his dick, but then he exhaled and wrapped his hand around himself. He let his head fall back again on his older brother’s shoulder, and although Xichen couldn’t see his face, he knew his eyes were closed.
He watched, transfixed, as Wangji moved his hand up and down his own cock. His movements, though steady, were colored with uncertainty, and Xichen knew without asking that this was his first time touching himself. He swallowed hard and clenched his little brother’s thighs to keep his hands occupied.
“Good, didi, so good…” It was barely a whisper against the shell of his ear, but he was rewarded with the smallest hint of a moan from Wangji’s throat. His hand moved faster on his cock, a bead of precum on the tip now. Xichen pulled his legs further apart, fingers shaking on his skin, digging in hard enough to leave bruises. He hated to bruise Wangji like this, but at the same time, he wanted to bruise him more, wanted to mark him and claim him.
The small moan from before repeated, but this time a little louder, a little more certain. Several followed, all soft and light from the top of his throat. His head fell slightly in, so his breath was on Xichen’s neck now.
Xichen dared to lift one hand off his thigh, let it trail up across his abdomen, the line of his muscles, to his chest. He brushed his fingertips over his younger brother’s tight nipple, and as he expected, Wangji arched into the feeling. He pinched harder and Wangji groaned in earnest.
Now that he had started touching him, he couldn’t stop himself. He bent his head down and kissed the side of his throat, continuing to toy with his nipple. He wrapped his other hand around Wangji’s own, on his cock, and pressed his thumb against the slit, against what had now become a small thread of precum.
“You’re close, didi,” it was a statement, not a question. Wangji whined. “Will you come for me?”
He bit his lip in response and nodded, a jerky movement. His hand moved fast up and down, still wrapped in Xichen’s own palm, as he worked through his very first orgasm, “ahh , ah, gege …”
“Shhh,” Xichen soothed gently, though his own breathing was erratic too, “good boy. So good for gege.” Sticky stripes of cum shot onto Wangji’s stomach, and Xichen let his fingers drag through it, lifted his fingers to his own lips and tasted it. Shame and arousal flooded him at once. Suddenly, he too was very, very close.
He lifted Wangji out of his lap as gently as he could muster, settled him on the floor in front of himself, between his legs. Wangji was malleable in his hands and obeyed everything as his brother directed him. Xichen tugged his own robes open and worked up and down his own cock with one hand, gathered Wangji’s hair in his other and used it to hold his head in place. It was only a few strong strokes before he was panting and coming across his brother’s face.
Wangji barely flinched, just parted his lips slightly, and his eyelashes fluttered to avoid getting any in his eyes. A stripe of cum landed across his headband and Xichen barely dared to breathe as he smeared it out with his thumb.
“W-Wangji…” he murmured. His voice shook for the first time since they had started, in the afterglow of his orgasm filled with shame and guilt for what he had done. He removed his hand hastily from his brother’s hair, desperate to stop touching him, but Wangji instead took his hand between his own.
“Gege…” He said, hoarsely, “Xichen.” His fingers curled tightly into Xichen’s palms and his eyes dropped, nearly closed as Xichen knew he was focusing on finding words. He knew he shouldn’t be too presumptuous, in the state he was in too eager to long for the best case scenario, but was never wrong about what his brother was thinking. He hesitated, and then reached out tentatively with his other hand and rubbed his thumb gently across his cheekbone.
“There’s no need, Wangji. I understand.”
Wangji slowly raised his eyes, met his older brother’s gaze evenly. Then he nodded, almost imperceptibly, and let his head fall forward onto the inner part of his thigh.
Because his brother asked him to, Xichen would stay.