Very cool and unique! Liked it a lot. 

Just to be clear, is Grace an older sister or their mom? I might have missed it but I don't think she was introduced. 

A story a week sounds cool. I would love to see Delaney do something like set him up to be stepped on or eaten by Alexis too. Like he says he doesn't want to be anywhere near Delaney's gross feet and so she punishes him by dropping him into Alexis's shoes and inviting her on a jog.

Would also love to see Delaney do something like drop Chase in her own pants, then pretend to "find" him in front of Alexis and act like he intentionally shrunk himself to sneak into her pants. Then Delaney could helpfully take over the role of punishing him by say dropping him back down the back of her pants before a workout class or something.