Jamie offers to do it. He doesn't have Alex's issues with this. Jamie would do worse than a spot of mass slaughter to get the two of them out of Davin's hands. 

No. Allowing Jamie to do this would be just as bad as doing it himself. Also... of the two of them, Alex is the one who's likeliest to be able to actually pull it off. He's a better fighter, has less long-term damage, and the alpha's less likely to decide to drag him off on a whim at any given moment. 

...That's true. 

"Doing this would hurt you," Jamie points out. "Really... really badly."

"Not doing this will hurt me, too," he points out in return.

"Maybe... we could just... say we'll do it."

"...You can't lie, Lex." Jamie can lie even to werewolf senses, if he frames the lie to himself correctly. Alex can't even lie to humans. Gullible ones. More to the point, Alex doesn't lie.

"I'll just do it," Jamie says, not leaving room for argument this time. "With training, and alpha power, I should be able to." So long as he's not wrecked at the time.

"Jay-"

"Mom told us to keep each other safe. This will keep you safe. You can hate me for it if you want, but I don't want you hurt anymore. I don't want to hurt anymore, either."

"...I won't hate you." He'll hate himself for not stopping him, more like. 

Jamie knows. Jamie will take 'Alex hating himself for not stopping him' over 'Alex broken by Davin' or 'Alex broken by killing innocents'. He's practical like that.

They're back in the clearing again the next night.

They detect the alphas before they arrive, of course-

-both of them.

He keeps one hand on the other alpha's arm. It could be a quelling or stabilizing gesture.

"Starrs. Do you have an answer for us?"

"Yeah. We'll do it." His voice is louder and steadier today, and all of his focus is on the two alphas. 

Somehow he wasn't expecting two of them, even knowing the pack is made up of multiple alphas. He watches them warily. 

At Deucalion's words his hands tighten into fists, the slightly-sharp tips of his nails digging into his palms. Still, he nods jerkily in time with Jamie's response.

"Brilliant. Let's start with introductions. Starrs, this is Ennis, a longtime friend and trusted enforcer. Ennis, these are the Starrs, whose unique gifts are being wasted by an alpha whose personal proclivities blind him to reality."

"I hear you're looking for an exit strategy. We can help."

"Blind to reality," Jamie considers this, eyes going distant for a moment before refocusing. "I s'pose so. At least... he lives in a different one than most people."

"Mm," he agrees witha sharp nod.

"Yeah, so he said," he says in response to Ennis' words, mouth twisting. "I'm Alex," he adds, "And my brother's James." 

"Let's begin with the strategy. This Davin seems to have three major factions within his pack: the sycophants, who believe he'll spare him, the sadists, who think they're like him, and the cowed, whose bravery and compassion have been ground out of them. We need to destroy all of them. Which of you can kill without compunction?"

"I can." 

Alex doesn't speak, but his nails actually start to break through the skin of his palms. 

"Are you certain? There's also the concern of playing to type. If your alpha is expecting you to be the twin he needs to watch more carefully..."

He turns to Alex.

"Have you ever killed before? There's no shame in it; most werewolves have killed at least one sick or dying human during lean times, and in a pack like yours, I can imagine far worse scenarios."