Alcide does need them to be friends, mostly because of what happened between them, partly because he just doesn't want to be completely alone in this weird-ass place. He'd rather the one person in this place who has seen all the less than savory bits of him be his friend, or at least be some kind of ally than the alternative.

Although, join them? Her and Derek? The three of them together? It isn't that Alcide is against threesomes. In fact, he's had a few when he was Pack Master. The rest of the pack is always so ready to please the Pack Master, without his even having to ask for things. Anyway, that's happened. But the idea of being with Buffy and Derek, who Alcide thinks he's insulted in some way, is just surprising.

His mouth opens around unspoken words several times as he accepts what she's said and wrap his mind around the idea of a threesome with...

"Yeah, no. It's better not to... what you said." Slut it up.

But Alcide can only divert so far. "You want me to join you and Derek?" In the... exploring.