As long as I can remember, Mom and Dad’s research assistants have spent nearly as much time at my house as I do. When I was very young, I thought they were as much my siblings as Josie was; I cried so hard the day Swathi gently explained that she was going back to live in New Delhi because she had a job and a family there. Who were these people? How could they be her family when we were her family?

My parents started being clearer about their assistants after that, but the fact is, most of them have wound up being more or less informally adopted. Mom and Dad always wanted tons of children, but pregnancy turned out to be difficult for her, so after me they stopped. I guess the grad students have had to fill the empty places where my brothers and sisters should’ve been. They sleep on our sofas, write their theses on the rainbow table, cry about their love lives, drink our milk straight from the carton. We keep up with every one, and some of them are important people in my life. Diego taught me how to ride a bike. Louis helped me bury my pet goldfish in the backyard even though rain poured down through the entire “funeral.” Xiaoting was the only one at home when I started my period for the first time, and she handled it perfectly—explaining how to use everything from our friends at Tampax, then taking me to Cold Stone Creamery.

Still, from the beginning, Paul and Theo were different. Closer to us than any of the others. Special.

And Paul was the most special of all.

Mom joked that she liked him because they were both Russian, that only fellow Russians could ever understand each other’s dark humor. Dad made a standing appointment for them to have lunch on campus together, and, once, let Paul borrow his car. He usually didn’t even let me borrow the car. Even though Paul was so quiet, so aloof, so apparently invulnerable to laughter—to my parents, he could do no wrong.

(“He’s weird,” I protested to them shortly after his arrival. “He’s like some kind of caveman from back before people could even talk.”

“That’s not very kind,” Dad said as he poured milk into his tea. “Marguerite, remember—Paul graduated from high school at age thirteen. He began his PhD studies at seventeen. He never had much of a childhood. Hasn’t really had a chance to make friends his own age, and Lord knows he doesn’t get a lot of support from home. It makes him a little . . . awkward, but that doesn’t mean he’s not a good person.”

“Besides,” Mom interjected, “whether by ‘caveman’ you mean Cro-Magnons or Neanderthals, there’s no reason to assume they lacked human speech.”)

Paul was their research assistant for only a year and a half—but they loved him more than any of the others. He practically lived at our house or in their classes, 24/7. They loaned him books, fussed when he didn’t have a jacket in winter, even baked him a birthday cake—chocolate with caramel icing, his favorite.

Theo Beck worked just as hard for them. They were never unkind to Theo; I’ve always felt like he belonged, and he’s definitely more fun than strange, watchful Paul. Theo’s black hair is always a little bit wild, everything is a joke to him, and okay, he flirts with me some, but I don’t think Mom and Dad ever minded. I’m not even sure they noticed. So Theo should have been equally beloved.

But Paul is smarter. More unique. He’s one step over the line that separates “extraordinarily intelligent” from “genius.” I could also tell that Mom and Dad thought Paul needed them more. Theo is cocky; Paul is shy. Theo cracks jokes; Paul seems melancholy. So Paul brought out their protective side in a way Theo never could. Sometimes, I knew, when Theo saw how my parents devoted themselves to Paul, he was jealous.

Maybe sometimes I felt jealous myself.

Within twenty minutes of arriving at the luncheon, I’ve been introduced to the duchess’s niece Romola, the one at Chanel. She’s not a designer there, merely a publicist, but as Aunt Susannah says, “Every connection helps, right?”

Surprisingly, Romola doesn’t treat me like a leech; instead she latches on to me. “We’re going to have fun,” she whispers. “About time someone interesting showed up.”

Ten minutes after that, I’m in the bathroom watching Romola do a line of coke. She offers me some, and I decline, but I suspect this dimension’s Marguerite would say yes without a second thought.

So fifteen minutes later, when Romola offers me champagne—at two in the afternoon—I say yes. If I’m going to be convincing as this Marguerite I need to play the part.

Aunt Susannah watches me start drinking, and she doesn’t say a word. I guess she’s used to it.

This party is the weirdest thing, simultaneously upper-crust and tacky. Cosmetic surgery has warped the faces of every woman over thirty; they don’t look younger, just not quite human in a way society has decided to pretend not to see. Half of the people are talking more to the holograms from their rings or badges than they are to the people around them. What conversation I can hear is mostly gossip: who’s shagging who, who’s making money, who’s losing it, who’s not invited to the next party like this.

Maybe the technology is different, but the shallowness of the scene is probably universal. So this is the life my father escaped when he chose to go into science, to leave Great Britain and join Mom in California. He was even smarter than I knew.

Here’s to you, Dad, I think as I grab another glass of champagne.

Seven hours after the luncheon, I’m behind the wheel of Romola’s car—a shiny silver teardrop that actually drives itself, which is good, considering how tipsy I already am. Romola herself is telling me about the amazing clubs we’re going to hit tonight. We’ve hung out all day. She acts like we’re friends now, like she’s going to get me an internship at Chanel. I know and she knows that we’re both just using this as an excuse to get wasted. I don’t think she’d let me ditch her if I tried.