Logan will nod. "That's sounds good that should keep her busy for a few hours." Zach will smile and look at Dahl. "You're welcome." And then look at Billie. "It happened right before we came in here. But I've liked Dahlia since she got here so." 

Haha Clary still scares Zach when she gets hyper. But I can just see her pulling some Billie-Logan stuff on them.

Very clearly! Lucifer seems like a good parent.