"KATHERINE!!" A loud booming voice tears through the air so far as Kat can tell, and it's so loud that Kat clamps her hands over her ears. Dan doesn't even hear it though, as it's not directed at him.
In truth, it's simply their mom telepathically yelling at her.
"You forget your place, child." Suddenly, mom is there, in a full, regal sorceress dress, with gold ornamentation and a coiled crown decked with jewels. She extends a hand and Kat crumples to the ground, huddled in a pained fetal position.
"You haven't even had your mystical prowess for one week and you're already shamelessly abusing it... foolish oaf. Daniel, go get dressed. And take that stupid collar off."
Dan looks down at himself, and sees that he's back to normal. He nods his head quickly and runs upstairs.
"Now then, Katherine... whatever should we do with you?"