Jiang Wanyin just looks sort of resigned. 

Perhaps Wei Ying can demonstrate by flopping against Lan Zhan and taking a mildly exaggerated bite of pheasant while so flopped. 

How... improper of him. (But it makes Wangji feel A Way that doesn't seem to be annoyance.)

Wangji will not correct him because Wei Ying is alive and his and no etiquette is really worth touching him any less. In a week or so he can go back to reminding Wei Ying that manners exist.

"Do you like the pheasant?"

"It's fine. When I was traveling by myself I just foraged edible plants that didn't need to be cooked, to save time. This is better." He wriggles against Lan Zhan slightly as if to suggest that improved food is not the primary reason traveling not by himself is better. 

Wangji sure is still in his teenage body and that sure is some wriggling.

His ears burn pink. "Quiet during meals," he manages, because it's that or knocking them both to the ground.

"Lan Zhan. We're not exactly at Cloud Recesses right now, you know." More wriggling. 

AAAAAA.

"Wei Ying." Ideally this is enough to convey: please stop wriggling against me before I ruin our pheasant and fuck you in front of your brother. - a second time.

Apparently it is, because he smirks and subsides. 

He doesn't stop leaning against him, though. 

This is acceptable he will survive.

Wei Ying finishes his pheasant, gnawing at the bones for slivers of flesh until he's satisfied that Lan Zhan is done with his. 

At which point he pulls off one of the long bones, cracks it between his back teeth, and starts sucking the marrow out very suggestively while making eye contact. 

(Jiang Cheng makes an extremely exasperated noise and flees.)

Finally. He pounces. "No etiquette," he murmurs against Wei Ying's neck, and then bites down.

"Aah! It's, it's me Lan Zhan, what did you expect?" he asks breathlessly, squirming to give Lan Zhan the best possible access to anything he may be trying to touch. 

Everything. He wants to touch everything. "Recalcitrant," he whispers, and then kisses him deeply.

Wei Ying wraps his arms around Lan Zhan's neck and kisses back with just as much fervor and makes desperate little whimpering noises. 

The little whimpering noises are wonderful and must continue. Wangji offers more Stern Critiques of Wei Ying's behavior as he fucks him very gently and kisses him very harshly.

"Ahh, Lan Zhan, what a strict taskmaster," Wei Ying gasps. "How could I ever live up to your expectations? You're just going to have to discipline me forever." 

"Mn." It appears that discipline currently consists of: more sex. Also some wrist pinning, and light scratches down his side.

Oh, look, it looks like Lan Zhan isn't coming first this time. 

Achievement unlocked.

He will celebrate by coming very quickly afterwards.

When he tries to pull out, Wei Ying makes a noise of protest and locks his legs around Lan Zhan's hips. 

Confusion!

Not - displeased confusion. There's a definite lack of displeasure. "Wei Ying?"

"I don't want there to be any part of me you aren't touching, right now." 

Well that's the most compelling argument he's ever heard in his life. He plasters himself over Wei Ying's chest and tries to ensure that maximal contact is happening.

Gooood. Good good good. This will earn him a melty cozy snuggly Wei Ying who wraps his arms around him and buries his face in Lan Zhan's shoulder and makes a little contented humming sound.