Kourtney Kardashian teases her cleavage in tawny top while out with sister Khloe's BFF Malika Haqq... following blow-out fight with Kim

Kourtney Kardashian was effortlessly stylish while stepping out for lunch with family friend Malika Haqq on Monday.

The reality star/mother-of-three paired subtle sex appeal with a laid-back silhouette as she slipped into her daytime attire.

During her afternoon out, Kourtney, 40, teamed a low-cut caramel top which elegant draped upon her decolletage with black acid washed jeans.

She's a natural! Kourtney Kardashian went for an effortlessly chic style while out to lunch with family friend Malika Haqq on Monday

She's a natural! Kourtney Kardashian went for an effortlessly chic style while out to lunch with family friend Malika Haqq on Monday

The ex of Scott Disick accessorized with rectangular tortoiseshell glasses and a pair of thong sandal heels, the Kardashian's trendy shoe du jour.

She kept things simple by slicking her hair back into a sleek, low ponytail.  

Meanwhile, Malika looked fierce in a sheer tiger striped duster and figure hugging black ensemble.

She showcased her hourglass figure via a pair of high-waisted black jeans with a clinky one-piece underneath. 

Effortless: During her afternoon out Kourtney teamed a low-cut caramel top which elegant draped upon her decolletage with black acid washed jeans

Effortless: During her afternoon out Kourtney teamed a low-cut caramel top which elegant draped upon her decolletage with black acid washed jeans

The cat's meow: Malika looked fierce in a sheer tiger striped duster and figure hugging one-piece with tight jeans

The cat's meow: Malika looked fierce in a sheer tiger striped duster and figure hugging one-piece with tight jeans

Rounding out the look was a Balenciaga bowling bag, peep toe heels and rich ombre tresses. 

While Kourtney looked confident and chic, she recently admitted that little sister Kylie's billionaire status has made her somewhat insecure.

When stopping by season six of The Real in LA on Monday, the 40-year-old TV star revealed there is plenty of sibling rivalry in her family.

The mother-of-three admitted that the most pressure comes from her 22-year-old half-sister Kylie Jenner who has already becoming a billionaire thanks to her Lip Kits.

It's hard being not a billionaire: Kourtney Jenner is feeling the heat. When stopping by season six of The Real in LA on Monday, the 40-year-old TV star revealed there is plenty of sibling rivalry in her family

It's hard being not a billionaire: Kourtney Jenner is feeling the heat. When stopping by season six of The Real in LA on Monday, the 40-year-old TV star revealed there is plenty of sibling rivalry in her family

But Kylie has MORE: The mother-of-three admitted that the most pressure comes from her 22-year-old half-sister Kylie Jenner who has already becoming a billionaire thanks to her Lip Kits

But Kylie has MORE: The mother-of-three admitted that the most pressure comes from her 22-year-old half-sister Kylie Jenner who has already becoming a billionaire thanks to her Lip Kits

'Probably subconsciously it makes us feel like when is it enough?' Kardashian said. 'And I think that’s a thing I always think to myself, you know, "When is it enough?" Because I don’t like missing out on certain things, like doing my kids’ homework or certain after-school activities.'

She already stars on KUWTK, updates her social media, poses for clothing companies and runs POOSH.

Kourt was also asked if she could have guesses they would all become so successful.  

Not sexy on this day: She played it safe in a black suit with tank top and little jewelry

Not sexy on this day: She played it safe in a black suit with tank top and little jewelry

For her other sis: Jenner modeled SKIMS to help sibling Kim Kardashian; she is worth over $1B

For her other sis: Jenner modeled SKIMS to help sibling Kim Kardashian; she is worth over $1B

'We didn’t even think about it. We just kind of hit the ground running. We just, you know, did it and it happened so quickly,' said the star.

Kylie told Ellen DeGeneres that she feels the family at times makes fun of her for her money.

'It’s only when we’re in a group chat talking about [how] we should go on a trip,' she explained. 'And then everyone’s like, "Kylie? Question mark? Are you gonna pay for it?’ Just stuff like that."'

She poses a ton: Kourtney is very busy with her projects, but she does not make as much as Kylie; seen on KUWTK on Sunday

She poses a ton: Kourtney is very busy with her projects, but she does not make as much as Kylie; seen on KUWTK on Sunday

This comes after a tough episode of KUWTK aired on Sunday.

Kim tried on her blue latex dress by Thierry Mugler and a metallic wig for the inaugural ball's after-party. 

The reality star, 38, poured her hourglass curves into the figure-hugging dress and FaceTimed Kourtney to show off her look, but was left feeling 'embarrassed' when her older sister joked she looked like 'Nicki Minaj on Halloween'.  

Daring: On Sunday's Keeping Up With The Kardashians, Kim tried on her blue latex dress by Thierry Mugler and a metallic wig for the inaugural ball's after-party

Daring: On Sunday's Keeping Up With The Kardashians, Kim tried on her blue latex dress by Thierry Mugler and a metallic wig for the inaugural ball's after-party

Kim flashed plenty of cleavage and her tiny waist in the skintight minidress, which featured a printed central panel and tinsel detailing.  

Pleased with the look, Kim FaceTimed Kourtney to show her the outlandish Thierry Mugler outfit she was preparing for that spring's Met Gala in New York City. 

'I was thinking about wearing this to your 40th birthday party,' Kim teased Kourtney. 'What? Is it too dressy?' 

Upping the style ante: The reality star, 38, poured her hourglass curves into the figure-hugging dress and FaceTimed Kourtney to show off her look

Upping the style ante: The reality star, 38, poured her hourglass curves into the figure-hugging dress and FaceTimed Kourtney to show off her look

Not a fan: Kim was left feeling 'embarrassed' when her older sister joked she looked like 'Nicki Minaj on Halloween'

Not a fan: Kim was left feeling 'embarrassed' when her older sister joked she looked like 'Nicki Minaj on Halloween'

'Are you coming as Nicki Minaj?' Kourtney asked. 'This is Cher, honey,' Kim answered, stroking white beads in her hair.

'I would say it's October 31st,' Kourtney affirmed, leaving Kim somewhat dejected.

In private, Kim grew angry: 'I've been planning my Met look since last year, and she was so rude in front of the whole Mugler team… it's all super-embarrassing.'

The Mugler manager told Kim that Kourtney's stylist had been trying to get their dresses, too.

'For her to not only try to use the same designer but then to be so rude, it really hit me the wrong way,' Kim declared. 

Busty display: Kim flashed plenty of cleavage and her tiny waist in the skintight minidress, which featured a printed central panel and tinsel detailing

Busty display: Kim flashed plenty of cleavage and her tiny waist in the skintight minidress, which featured a printed central panel and tinsel detailing

Oh dear: 'Are you coming as Nicki Minaj?' Kourtney asked. 'This is Cher, honey,' Kim answered, stroking white beads in her hair

Oh dear: 'Are you coming as Nicki Minaj?' Kourtney asked. 'This is Cher, honey,' Kim answered, stroking white beads in her hair

Upset: 'I would say it's October 31st,' Kourtney affirmed, leaving Kim somewhat dejected

Upset: 'I would say it's October 31st,' Kourtney affirmed, leaving Kim somewhat dejected

Bizarrely, the stylist had also scooped up a bunch of Rick Owens tops that had been fashioned after a look Kim wore to the CFDA Awards in June.

'She keeps copying me!' Kim cried to her stylist, Danielle.

Kourtney, trying on another outfit at her house for her 40th birthday party with Khloé, hit back over the phone.

Halloween costume: Kourtney mocked Kim and said she looked ready for Halloween

Halloween costume: Kourtney mocked Kim and said she looked ready for Halloween

'I don't know what you're talking about,' she told Kim. 'I've never dressed like you.'

Kim was frustrated, saying: 'I don't think Kourtney really understands the legwork that goes behind this.'

She said she sometimes spent months working with designers on outfits.

After much of the episode quarreling to and forth, Kourtney eventually apologised to Kim and said she'd had no idea that Kim's blue dress had been for the Met, or that Mugler's team had been there when she FaceTimed her. 

Keeping Up With The Kardashians will return next week on the E! network.

Kourtney Kardashian teases her cleavage in tawny top while out with sister Khloe's BFF Malika Haqq

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