[He has to pause and think about this one, to avert his gaze into the dead space of the kitchen.]

Actually, I... I mean, yeah, I guess we gotta go home eventually, but. [He pouts a little, looking into his cup without drinking.] But I was having so much fun here I kinda forgot about it.

[Magnus hadn't thought about going home to fix things until this moment, actually. It's clear he feels guilty about that.

When he's done pouting, he looks back at Lucretia.] I want to stay, too. And I'd be real sad if you left without me.

[There's an implied but... at the end of that statement.]