'Me as a mom': Kendall Jenner holds Reign on her hip while browsing through phone... as Kylie says they are 'cool aunts'

She has amassed over 43 million followers on Instagram alone, so there's little doubt Kendall Jenner is glued to her phone.

And it seems the 20-year-old knows she will remain tight-knit with her device well into the future, even as a mother.

On Saturday, catwalk queen Instagrammed a photo of herself with her nearly one-year-old nephew Reign on her hip as she scrolled through her phone, which she captioned, 'Me as a mom.'

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'Me as a mom': Kendall Jenner Instagrammed a playful snap of herself with her nephew Reign on Saturday

In the image, Kendall sported a long camouflage print jacket, black top, and aviator sunglasses propped upon her head.

It seems Reign, whose parents are Kourtney Kardashian and her ex Scott Disick, remained in the centre of attention between his doting aunts Kendall and Kylie Jenner that day.

Kylie, 18, also Instagrammed a playful video of herself and Kendall supervising their nephew, which she captioned, 'the cool aunts.'

'The cool aunts': Kylie Jenner also shared a brief clip of herself with sister Kendall supervising Reign

'I love you baby angel,' read the caption to another video shared by Kylie, which saw her fawning over her cherubic nephew.

Meanwhile, on Saturday Kendall took a break from her high-flying life for a low-key day of shopping at Barnes & Noble in Los Angeles. 

Kendall wore all black for the shopping trip, showing off her long modelesque legs in a pair of tight skinnies.  

'I love you baby angel,' read the caption to another video shared by the teen, which saw her fawning over her cherubic nephew Reign

Inside the store, Kendall looked determined as she combed through the bookshop. 

After selecting the winning item, Kendall headed outside with a shopping bag in hand and her stylish aviator shades propped upon her face. 

Outside, Kendall was photographed catching up with a male pal with a smile on her face.

Cool customer: Jenner donned cowboy boots for a day of shopping at Barnes & Noble in LA county on Sunday

Kick it like Kendall in some Western inspired ankle boots

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She's officially landed the coveted title of 'supermodel' according to Vogue. So Kendall Jenner has to dress the part. But that's no problem since the leggy brunette has a seemingly endless wardrobe.

On a recent shopping trip, the reality star donned an all black outfit that consisted of a long sleeve top, skinny jeans and a pair of Saint Laurent cowboy boots. She accessorized with an embellished belt, Ahlem sunnies and a Celine Nano bag.

The Western motif is one of those trends that will never go out of style so if you choose to invest in some cowboy boots like Kendall's you won't go amiss. This particular pair is almost sold out though so click right to scoop them up on sale at Bluefly.

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There's little doubt a low-key weekend at the shops was exactly was in order for the model, who looked relaxed as she made time for her pal.

Just last weekend she became an aunt once again when her older sister Kim Kardashian and husband Kanye West welcomed their second child, a son named Saint. 

Now Kendall's promising modelling career has made headlines once again.

On the hunt: The model looked determined as she combed through the bookstore 

Vogue named Kendall and her good friend Gigi Hadid official supermodels on Tuesday. 

'What truly makes Kendall and Gigi super material is the interest they generate off-duty. Bombshells next door, they are even better known for their selfie skills than for their work with the pros,' the magazine stated.

'Their celebrity is unquestionable, and that makes them contenders for the supermodel title - even Karlie Kloss doesn’t have as much name recognition. 

'Whether the heat that surrounds them now will result in the decades-spanning success enjoyed by the likes of Moss and Campbell remains to be seen, but for the moment Hadid and Jenner are the supermodel heirs apparent.' 

Welcome to the family! Just last weekend she became an aunt once again when her older sister Kim Kardashian and husband Kanye West welcomed their second child, a son named Saint