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Kourtney Kardashian shows off her pert derriere in cycling shorts at her Malibu beach house

She fled her home in Calabasas for a week to stay in a Malibu beach house.

And on Friday, Kourtney Kardashian, 41, spent some time on the coast with daughter Penelope, eight, youngest son Reign, five, and niece North, seven, on the oceanfront property.

Meanwhile, Kourtney’s ex Scott Disick, 37, was hanging out in the pool house pool with their eldest son Mason, ten.

One more day: Kourtney Kardashian was spotted on Friday during another picturesque day at her Malibu beach house

One more day: Kourtney Kardashian was spotted on Friday during another picturesque day at her Malibu beach house

Kourtney showed her enviable legs and walked behind in black cycling shorts as she climbed the wooden stairs that led from her beach house to the shore.

She paired her mini shorts with a bright red Adidas zip jacket and the iconic stripes on the arms in black.

Kardashian just smiled as she talked to her friends with a pair of child-sized slip-ons in her hand.

Her long raven hair was pulled back into a smooth ponytail and she sported a minimalist makeup look.

Beach Body: Kourtney showed her enviable legs in black cycling shorts as she walked up the wooden stairs that led from her beach house to the shore

Beach Body: Kourtney showed her enviable legs in black cycling shorts as she walked up the wooden stairs that led from her beach house to the shore

Beach Body: Kourtney showed her enviable legs in black cycling shorts as she walked up the wooden stairs that led from her beach house to the shore

Playtime: Kourtney was joined by her daughter Penelope, eight, youngest son Reign, five, and niece North, seven, on the oceanfront for a day in the sand

Playtime: Kourtney was joined by her daughter Penelope, eight, youngest son Reign, five, and niece North, seven, on the oceanfront for a day in the sand

Playtime: Kourtney was joined by her daughter Penelope, eight, youngest son Reign, five, and niece North, seven, on the oceanfront for a day in the sand

As Kourtney walked up the stairs and back into the beach house, Penelope, North and Reign stayed in the sand with two adult attendants.

Each of the children reflected their individual personalities in their swimwear as they stood together and thought about their next beach activity.

North happens to be the oldest child of Kourtney’s sister Kim Kardashian, 39, and husband Kanye West, 43.

By brand: she paired her mini shorts with a bright red Adidas zip jacket and the iconic stripes on the arms in black

By brand: she paired her mini shorts with a bright red Adidas zip jacket and the iconic stripes on the arms in black

By brand: she paired her mini shorts with a bright red Adidas zip jacket and the iconic stripes on the arms in black

Chatty: Kardashian smiled all the way as she chatted with her boyfriends with a pair of child sized slip-ons in her hand

Chatty: Kardashian smiled all the way as she chatted with her boyfriends with a pair of child sized slip-ons in her hand

Chatty: Kardashian smiled all the way as she chatted with her boyfriends with a pair of child sized slip-ons in her hand

Kourtney shares Penelope and Reign, as well as eldest son Mason, with ex Scott, from whom she divorced in 2015.

Scott documented part of the father-son time he spent with Mason on his Instagram story, including a snapshot of Mason relaxing in a pool.

Disick also captured the incredible view from the top of the rental house, which overlooks the vast ocean.

Later, Kardashian decorated the entrance to her outing with balloons as she celebrated the birthday of Kardashian’s family friend Phil Riportella.

Fun: Later in the day, Kourtney uploaded a sweet snapshot of Reign holding a chicken in his hands, rocking his adorable turtle-print swimsuit to his Instagram story

Fun: Later in the day, Kourtney uploaded a sweet snapshot of Reign holding a chicken in his hands, rocking his adorable turtle-print swimsuit to her Instagram story

Fun: Later in the day, Kourtney uploaded a sweet snapshot of Reign holding a chicken in his hands, rocking his adorable turtle-print swimsuit to his Instagram story

Bonding: Meanwhile, Kourtney's ex Scott Disick, 37, was hanging out in the pool house pool with their eldest son Mason, ten

Bonding: Meanwhile, Kourtney's ex Scott Disick, 37, was hanging out in the pool house pool with their eldest son Mason, ten

Bonding: Meanwhile, Kourtney’s ex Scott Disick, 37, was hanging out in the pool house pool with their eldest son Mason, ten

Kourtney shared the decor on her Instagram story, which included large silver balloons that read ‘Phil’ and several gold and black balloons.

In the background of the POOSH founder’s short clip, fans got a glimpse of the impressive outdoor fireplace available to Kourtney and her beach crew.

She also uploaded a sweet snapshot of Reign with a chicken in his hands, rocking his adorable turtle-print swimsuit.

Happy Birthday: Later Kourtney decorated the entrance to her outing with balloons as she celebrated the birthday of Kardashian's family friend Phil Riportella

Happy Birthday: Later Kourtney decorated the entrance to her outing with balloons as she celebrated the birthday of Kardashian's family friend Phil Riportella

Happy Birthday: Later Kourtney decorated the entrance to her outing with balloons as she celebrated the birthday of Kardashian’s family friend Phil Riportella

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