Natalia Vodianova has the accent of a seductive James Bond villainess: husky, her native Russian laced with Parisian fricatives. She's probably a good deal tougher than Bond though, despite her bone-snapping appearance. She has a focused determination that seems uniquely Russian: unrelenting and hard.
Whereas the cliche once belonged to gymnasts and piano players, Russia now seems to export these gritty female entrepreneurs whose work ethic makes us all look idle.
Last time I met her she was eight months pregnant and wearing a sweatshirt over a bump the size of a bumbag. Two babies in the intervening three years and I detect a little concealer around the eyes, maybe a shallow frown line. At 35, she's a mother of five (five!). Is she done? "For a while," she smiles. "I need to make sure I do well with everything else I have on, which is a lot."
Yes, well she certainly packs it in. There's the modelling from which she made her name, a multimillion-dollar career trimmed to an efficient 20 days a year. Then there is her Naked Heart Foundation, which has raised $50 million since 2004 for children with disabilities. Four years ago she launched Elbi, an app which allows people to "micro donate" by pressing a "love button".
She calls it "a philanthropy collective", happily reclaiming a word once soaked in communist propaganda.
"It's a very Russian idea," she continues. "You don't have 100 roubles but you have a hundred friends. It's about collective power."
It's tempting - oh, so tempting - to see her as just another rich celebrity patronising the poor and relieving her conscience with "good works". After all, she was married at 19 to the aristocrat Justin Portman, 13 years her senior, whose family coffers pulsate with revenue from the large chunk of central London it owns.
Now she lives with the father of her two youngest children, Antoine Arnault. He's the son of Bernard Arnault, the owner of luxury-goods company LVMH, worth $73 million and ranked the eighth-richest person in the world. Arguably, she has a Marie Antoinette existence in central Paris, with a view of the Eiffel Tower from her apartment and any material thing her fluttering heart desires.
But that is to oversimplify. Hers is a rags-to-riches story: a childhood below the poverty line in Nizhny Novgorod, a bleak industrial city in western Russia. She and her mother, Larissa, were abandoned first by her father, then her stepfather after her half-sister Oksana was born with autism and cerebral palsy.
By 11 she was selling fruit by the side of the road. Cold, hunger, survival - these were not alien or romanticised concepts. The mark of poverty is still on her, she says, most explicitly in her understanding of the "shame" that surrounds it.
When I ask if she can see it in others, she surprises me: she starts to cry. It touches something visceral.
"It's a very emotional question. For those simple families who nobody cares about, really living with that stigma [for example] of disability, then even if I give them money, it's not enough. The best thing I can do is spend time with them."
She says shared traumatic experiences such as living in poverty or losing someone to cancer transcends friendship, nationality, blood "or any other bond". In an ideal world, she says, we would draw on our experiences to comfort one another more often. "We have blind corners ??? we may have next door someone who we could understand."
I'm sure psychologists could find an unconscious link between the hardship of childhood and her attraction to extremely rich men. But one driving, and very conscious, ambition has been to improve her mother's life.
"And I have succeeded. My mother has a little business and is independent. She can buy me presents that I did not pay for." She says Larissa instilled in her two things: self-reliance and a steely drive. ("I tell myself this is the heritage I am leaving my kids: a work ethic.")
"My mother was in a desperate situation, working four jobs, raising kids alone. From a young age she taught me, 'Only rely on yourself. You have to be strong. You have to do it for yourself.'
"And she lived it. For me, the government was a faraway thing that did not affect me, touch me or help me." Of course, her children are growing up in a different universe, with easy proximity to the government. She has met French President Emmanuel Macron and his wife, Brigitte.
We sidetrack to discuss the age difference of 25 years between Macron and his wife, and Natalia gives a Gallic shrug and says this is not unusual in Paris. "I often see it where you have this incredibly handsome young guy with this beautiful older woman - and obviously much older. It's quite common. If he wasn't the president, no one would blink."
We are sitting in the showroom of made.com on Rue ??tienne Marcel surveying yet another of her projects combining tech and fundraising, a children's furniture range she has designed for the online company co-founded by her friend Brent Hoberman of lastminute.com fame. A bedroom scene - bed, wardrobe, bookshelves decorated with matryoshka dolls - has been set up in a little tableau vivant beside us.
Natalia tells me she met Hoberman through the online community of tech entrepreneurs, Founders Forum, and he insisted she get involved, which wasn't a chore as she loves tech. Importantly, all proceeds go to Naked Heart.
She takes me through the detail - the pull holes for drawers to stop little fingers getting trapped. "This is a phobia for me because when I was five someone closed the door on my finger. I still remember the pain."
So what was her own bedroom like growing up? "I didn't have a bedroom," she says.
In 2015 with her children by ex-husband Justin Portman: Lucas, Neva and Viktor. Photo: Getty Images
"Every single one" of her children - Lucas, 16, Neva, 11, Viktor, 10, with Portman; Maxim, 3, and Roman, 1, with Arnault - have just done a publicity shoot here and "loved it", she says. She softens when she talks about her kids, flipping one thigh-high boot over the other, her rod-straight back dissolving a little.
They were all breastfed, "which is very, very tiring. None of my children slept, so for 15 years I've been up every night twice at least."
She has help - "of course, or I wouldn't be here" - and keeps tabs on each of the children by carving out one-on-one time. "I have moments where I feel I'm losing control - that's motherhood."
They don't complain, although recently she overheard the youngest of the Portman brood saying to the eldest, "Yes, but you had Mummy to yourself for four years."
The three eldest moved to Paris from a rural house in England's West Sussex in 2012. "Of course, they left friends behind and I do sense that they miss the pleasures of the countryside because they don't have this in Paris. But they've settled well. And now they speak another language."
Are they very Parisian now? She smirks. "No, they are still very English." Paris was the first European city the 17-year-old Natalia experienced on arriving from Russia as a fledgling model. "I spent one year here as a girl with no money, going on the Metro, really discovering the city. And it's probably the city I know the most, apart from my home town."
At 18 she moved to New York, where she threw herself into work. And it was there she met the sybaritic Portman, an artist and prince charming with a taste for models (he's recently been dating Ukrainian Anna Shut, 23).
Natalia could have lived happily ever after if her happily ever after had been going to parties, looking pretty and staying up late. She once said that "the biggest differences between England and France is royalty versus republican, and my marriages reflect that. My first husband was a member of the aristocracy, did not work, but was a walking encyclopaedia. My second husband is a workaholic."
I ask her to elaborate. "I am a workaholic as well," she says brightly. "That's why it didn't work with my ex-husband. We loved each other but we were just very ???" She searches for the elusive word. "Our rhythm of life was different."
In the past she has described Portman's parenting as 'hands-off'. "With Antoine, we love to get up in the morning, be with the children, then go to work."
The British aristocracy, she says, was "another world", not necessarily welcoming to outsiders. "It's a beautiful world, yes. But if you haven't been born into it, it can be difficult to be part of. I was born into a working-class family."
By age 19, she was married to Portman and had her first child. She stepped back on the runway 10 days after giving birth. "[Portman] had all this free time to follow me and our baby around in my crazy career. At the time I thought I knew everything. I thought that it didn't matter that we were so different because we had complicity elsewhere. In emotional ways we were very supportive of each other."
On returning to England, they bought a country house and filled it with children and animals. But the "glue" of their relationship began to come apart and Natalia's patience with Portman's partying wore thin.
She first met Arnault in 2008 at a shoot for Louis Vuitton, although she doesn't remember it. They met again in 2011, and after two dates she was smitten. Moving her three children to Paris wasn't difficult, as Portman spends so much time wrapped in a sarong on a sprawling estate in Uruguay.
But shortly after they separated, Portman wrote a post on Facebook saying that his life was not in "synchronicity" with her "fashion" life. He claims she was embarrassed by him, treated him like an "old Louis Vuitton handbag" and that after a stint in rehab she didn't receive him home with any warmth.
She describes the 40-year-old Arnault - chief executive of menswear brand Berluti and the chairman of Italian cashmere company Loro Piana - as "always happy to go to work: very driven and very hardworking".
She continues, "We are very well balanced. He inspires me and I think I inspire him because of the same energy I give, but to philanthropy.
"He is an incredibly compassionate person. But like any man his view is, 'Make your own money first, secure your career, your wellbeing, the wellbeing of your family - and then you think of everything else'." She says she feels guilty about working so hard, "especially when, in principle, I don't have to work any more".
She compensates by having no time to herself - and even then she feels guilty. Last night, she says, she tried to enhance her evening beauty routine by five minutes. "I swear to god, I am standing there doing this, thinking, 'Ah, my husband is already in bed. I could be cuddling with him.' I tell myself, 'Shut up. Stop it. You're crazy.'
"But I can't help it."