Edmund turns to kiss Lex while Scorpius is distracted. "Shut up," he advises during a breath.

"You shut up."

When Scorpius turns around with flasks in hand and trousers being swiftly kicked off he freezes in place, mouth hanging lightly open. "Oh, I approve of this so much," he says, his free hand immediately reaching down so he can stroke himself sort of absently while watching his boyfriends kiss.

"He approves!"

"Hmmm. I wonder..."

Edmund drops to his knees and gives Lex's cock a cautious lick, looking to Scorpius for further approval.

Fuck okay he leans most of his weight back on the desk and starts jerking himself off with more feeling. Trousers off shoes off he can deal with his socks and T-shirt later. He doesn't leak as much precum as Edmund does but a fair amount nevertheless, and after he places the vials on the desk to free up a hand he goes at it with both hands.

Edmund snags one of the vials and downs it before returning to his work.

He's inexpert, and Lex is big enough that this means he's mostly just licking and stroking with occasional forays into sucking around the head, not really properly sucking him off. But he knows enough to keep his teeth out of it, and he's clever and experimentally inclined.

Lex is not complaining! At all!

The potion feels weird inside. Shivery? Tingly? Like it's going all the way down his entire body and—it's really quite indescribable. But his muscles, especially the relevant ones, do sure feel more relaxed. Also his gag reflex may be a bit less?

Scorpius decides taking the potion himself is not a bad idea regardless of plans so he gets himself one of the vials but then it's back to jerking off. "The two of you look so hot like that," he murmurs. His eyes show the truth of it, too, running all the way from Lex's face down to Edmund's ass, as does his tongue, licking his lips with a lot of appreciation.

Edmund removes Lex's cock from his mouth long enough to say "I completely bungled this but in my defense it was right there - Lex, come on, over here -"

He positions Lex across the desk from him and bends over to start sucking him again, this time giving Scorpius a much better view of his ass and the erection dangling heavily between his legs, dripping on the varnished wood.

Ohhhh this is great his boys are great this is so hot—

"I've a mind to take you from behind while you blow Lex," he says, straightening up from his resting position to walk over to Lex and kiss him. And if his dick pokes Edmund on the cheek or something, that is not entirely accidental.

Kiss!!!! While his dick is getting sucked!

Edmund elects, in lieu of verbal assent, to reach behind himself and pull one cheek aside as a sort of visual invitation.

Scorpius sees that and pulls away from the kiss to giggle. "I'm gonna need a bit to loosen you up so I hope you're enjoying having your mouth stuffed with dick for the moment," he says. He gives Lex another quick kiss and then walks over behind Edmund's ass and kneels down so he can inspect it from up close.

With his tongue.

He twitches, but not unhappily, and hums around Lex's prick. 

He hasn't eaten ass in a while—for some reason other people don't tend to trust him with random potions even when they're fucking—so he'll savor the moment for a bit.

...only a bit, though. He does need to use his fingers to get Edmund ready. Starting with one, he has no idea how much Edmund has played with himself there in the past and it wouldn't do to go with too much even if the potion's relaxation effects would help a lot.

He seems happy about one finger!

Scorpius will jerk Edmund off at the same time; some people (himself included) can do with only anal stimulation but he doesn't know if Edmund is one of them. And then Scorpius can move on to two fingers! And then maybe three! Four will be when he deems Edmund to be Sufficiently Prepped, and while he'd like to be fucking Edmund right now with his actual cock he's not not having fun with the fingering, especially with how Edmund seems to appreciate it so much. But if he tries to go all in it will probably be less fun so, patience.

Edmund wiggles about two fingers, but at three he pulls off of Lex to gasp "Give me a minute to - get used to that -"

"Take all the time you need, love," he says, giving Edmund's dick a squeeze and his asscheek a kiss. Then he looks up at Lex. "Doing alright there?"

Continued happy whimpering! It kind of looks like he's generating mana off not cumming yet.

He gets enough capacity back from the direct question and Edmund's mouth leaving his cock to haphazardly start scritching Edmund's head. 

"I still think you must be breaking some law being this cute."

He continues to massage Ed's muscles, paying particular attention to his prostate of course, while his other hand jerks Ed off just enough to keep him hard. It wouldn't do to have him come too early, now, would it?

Eventually Edmund says "O-oh - okay - I would really like you to fuck me -"

"Your wish," he says, giving Edmund's cock one last squeeze and his asscheek a small nibble. Then he gets back on his feet and stretches his legs a bit. He has to stroke himself for a second to get back fully up, but not too much, even with zero stimulation this whole situation is just too hot. Then he places the tip of his dick right at Edmund's entrance, one hand helping aim it and another holding Edmund's ass. "Let me know if you want me to stop," he murmurs, and starts slooowly pushing in.

Edmund stops him a couple of times to adjust, but mostly what he does is cling to the desk, humping desperately against the wood occasionally, and occasionally moan loudly around Lex's cock.