Ivan must be drunker than he thought he was. He could have sworn he knew his way around Vivienne's parents' house, since she wanted to introduce him last week and showed him the place, but maybe they have a... secret... upstairs... bar? where Vivienne's room is supposed to be? And most certainly was last time he checked? He's never going to find the sweater she sent him up looking for here, anyway. Why is there a secret upstairs bar in Vivienne's parents' house?
How the hell does a baby in a basket show up on the doorstep of the Imperial fucking Residence without anyone finding out where it came from?
"How about that. I've never gotten any relatives from baskets."
"So you like your cousin Nika," says Big Ivan.
"Yeah, she's pretty good."
"Well, she's the only Nika around, you see. We already know what Ivans and Mileses are like."
"Oh."
"And," Miles adds, "she came from a basket. Almost nobody comes from a basket. Baskets are an interesting origin for a person to have."
"It's a mysterious basket, if nobody knows where it came from before Nika showed up in it."
"Oh. ...Do you want her basket? I don't know if she'd give you her basket."
He might want the ImpSec report on her basket, but six-year-old Ivan is unlikely to be able to get him that either.
Big Ivan sets up another round of whirligig. Tiny Ivan loses this one.
Tiny Ivan says, "If you want to know stuff about Nika I could just get her."
"The garden is only temporarily missing. If you ran off to get her it might be here again when you came back, and we wouldn't be here anymore, because we're in this place and not in the garden."
"Probably," says Tiny Ivan. "Should I yell for her?"
Big Ivan looks at Miles.
"WHAT THING," calls back a girl's voice.
"IT'S JUST A THING, C'MERE."
"OKAY FINE JUST A SECOND."
Tiny Ivan waits patiently for somewhat longer than a second, and then in toddles a cute little Asian-looking girl. She trips on her way in.
"Where'd the garden go?"
"It's missing," says Tiny Ivan.
"Gardens don't go missing," says Nika. "They aren't socks. Who are these people?"
"They're named Ivan and Miles!" says Tiny Ivan. "And they're cousins, too!"
Nika squints at the people thusly named.
Somehow he suspects tiny Ivan's lack of curiosity is not going to hold here. (They aren't socks. Yes, this is an acceptable Vorkosigan sibling.)
"N...o," he says. "Not personally, let's say. This place made part of my cousin Ivan's friend's house go missing the same way it made your garden go missing, and he got me to come look at it, and now here we are. But I know I can't be time-travelling from exactly your future because I never had a little sister, basketed or otherwise."
"I do all right," he says instead, hoping this strikes the right balance of reassuring without insulting.
"I figured it out by myself," he says. "With some interference from my parents."