Kourtney Kardashian enjoys a cozy Sunday as she helps plug sister Kim's Skims loungewear range
Daily MailShe spent Saturday celebrating the birthday of both her sons, Mason, 10, and Reign, five, who are born exactly five years apart. The 40-year-old took to social media to share her cozy loungewear ensemble, all while plugging her younger sister's new brand. Scroll down for video Relaxing: Kourtney Kardashian enjoyed a cozy chilled Sunday morning in her sister Kim's loungewear Skim range, after celebrating the birthdays of her sons, Mason, 10, and Reign, five 'cozzzzzy morning,' she captioned the photo. Kim launched the latest range via social media last week and most of the items sold out within the first hour Kourtney's dark hair was styled out and she appeared to be wearing a natural amount of makeup. And the casual Sunday appeared to be a theme and perhaps even a party for the star, taking to her Instagram Stories to reveal she had an apple cider station and outdoor fire place burning.