"Nice to meet you, loves. Would you like me to make you something?"
She looks at the other three, but pretty meaningfully at Karen, and says, "It's okay, you can ask for whatever you like and there won't be any problems."
...Miranda stands near Karen and tries to look related to her or something. "We're not hungry but thank you."
And Willow promptly ushers them out.
"Sorry, er, I forgot about her!"
"Sorry! There aren't any more—well except for Mr. Boris who minds the horses but I can get him to go away before we go play with them."
"It's okay," says Miranda. "You didn't say anything to her. Just tell them you didn't talk to any Muggles who weren't in under the Statute."
"...okay, but why would you get in trouble just by interacting with a muggle?"
"For breaking the Statute of Secrecy. If I said the wrong thing. They said when I'm older I could try going somewhere as long as people who know about Muggle things are with me but for now they don't want to risk it."
"They might not be assessing the risk quite right but it would have been pretty easy to ask Ms. Hannah for pumpkin juice, say, and she's probably already wondering why Karen is dressed like that." (Karen lacks Muggle street clothes; what she has on is not a school uniform, but it would barely be in-place at a renaissance faire, let alone out and about in a Muggle town.) "The risk is much worse for Ms. Hannah than for Karen, whyever her parents made the rule, anyway."
"I don't think she's wondering about that, my brother's brought people dressed, erm, differently before, and both mum and dad have varied guests—okay, I'm making up excuses, sorry, I just didn't think of it."
"Nothing happened. But maybe Karen shouldn't come over again anytime soon unless Ms. Hannah's having a vacation."
She nods. "Well, erm, want to see the rest of the house? No other muggles here." Pause. "Except for mum and siblings but they know."
"Your family are fine," Karen says. "And yeah let's see the rest of the house."
There are at least three rooms that could be reasonably called "living room," and there's the dining room there, and the games room, which has a chess table and a checkers table and a backgammon table and a go table and a few other scattered tables and chairs and a little couch and decks of cards.
"See anything you like here?"
"Hmm, there are some board games in that closet but I guess you probably don't know them either... Are all your games magical?"
"Wixen do play chess but with animated pieces. The rules are the same more or less, though."
"And are all those games completely original to wixen? I guess when you have magic to animate games the possibilities expand a lot, huh."
"Well, some of them are probably inspired by Muggle games but chess is the closest match."
First is the study it is relatively small, compared to the rest of the house. There are two desks filled with papers and one computer on each, as well as a bookshelf, a couple of chairs, a corner table, two armchairs, and Willow's mum on one of them, reading bunches of papers and writing stuff on them.
She looks up when Willow knocks and opens the door, and smiles at them, standing up to greet them. You can definitely see the family resemblance, there. "Hello! You must be Willow's friends. I'm Catherine."