Yeah. He will be completely inconsolable at first too. Oh. Bad news. And Clary will try to hold on until Billie comes back because she knows Logan will need her. Oh and Billie will just shake her head. "I'm gone for a few days and everything changes. Fucking A." 

Oh lord. It will get bad. She'll piss him off enough to get him to hit her and then it will be on. I see the whole thing pissing off more than one person.

Just like at first when the demons are siding dark, aside from a select few, shit will be bad, I could just see it.