Does Kourtney know about this? Scott Disick's girlfriend Sofia Richie, 19, spotted spending time with his three children for first time at sushi dinner

Sofia Richie and Scott Disick have been spending a lot of time together.

And the Instagram model, 19, and her reality star beau, 34, were spotted out together again in Malibu on Saturday night.

However, this was the first time Sofia has been seen publicly with Scott's three children - Mason, eight, Penelope, five, and Reign, three - whom he shares with Kourtney Kardashian.

Out and about: Sofia Richie and Scott Disick he Instagram model, 19, and her reality star beau, 34, were spotted out together again in Malibu on Saturday night; Sofia pictured with his kids Penelope and Mason

Out and about: Sofia Richie and Scott Disick he Instagram model, 19, and her reality star beau, 34, were spotted out together again in Malibu on Saturday night; Sofia pictured with his kids Penelope and Mason

Sofia was effortlessly chic as she showcased her gorgeous gams in a pair of skintight black leggings.

The daughter of Lionel Richie tucked the pants into high heeled black boots as she bundled up in a warm pink sweater. 

Daring to impress, she left her newly dyed brunette locks long and loose as they cascaded over her shoulders. 

She left the trendy eatery Nobu first with Penelope and Mason in tow.

Fancy: However, this was the first time Sofia has been seen publicly with Scott's three children - Mason, seven, Penelope, four, and Reign, two - whom he shares with Kourtney Kardashian

Fancy: However, this was the first time Sofia has been seen publicly with Scott's three children - Mason, seven, Penelope, four, and Reign, two - whom he shares with Kourtney Kardashian

Good times: She left the trendy eatery Nobu first with Penelope and Mason in tow
Good times: She left the trendy eatery Nobu first with Penelope and Mason in tow

Good times: She left the trendy eatery Nobu first with Penelope and Mason in tow

The doting dad soon followed carrying the youngest of the brood, Reign, as the stylish troop jumped into a black luxury Cadillac SUV.

Scott and Sofia went public with their romance in September, although they were linked as far back as May. 

The jet-setting couple have taken numerous trips together in the short time they've been dating including Colorado, Miami, Italy and Los Cabos. 

Fun: Sofia was effortlessly chic as she showcased her gorgeous gams in a pair of skintight black leggings

Fun: Sofia was effortlessly chic as she showcased her gorgeous gams in a pair of skintight black leggings

Devoted The doting dad soon followed carrying the youngest of the brood, Reign, as the stylish troop jumped into a black luxury Cadillac SUV

Devoted The doting dad soon followed carrying the youngest of the brood, Reign, as the stylish troop jumped into a black luxury Cadillac SUV

Close: Mason stayed close to his little sister, Penelope

Close: Mason stayed close to his little sister, Penelope

After nine years together, Scott and Kourtney called it off in 2015. 

Since they broke up however, the PrettyLittleThings designer has been besotted with boxer Younes Bendjima.

Kourtney met Younes in October 2016, just before her sister Kim Kardashian was robbed at gunpoint in Paris. 

The pair were then spotted on holiday together in Cannes, France in May, and have only gone from strength to strength since.

Family time: Scott and Sofia went public with their romance in September, although they were linked as far back as May

Family time: Scott and Sofia went public with their romance in September, although they were linked as far back as May

Home bound: The jet-setting couple have taken numerous trips together in the short time they've been dating including Colorado, Miami, Italy and Los Cabos

Home bound: The jet-setting couple have taken numerous trips together in the short time they've been dating including Colorado, Miami, Italy and Los Cabos

What an evening: After their meal they headed home

What an evening: After their meal they headed home

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