The Keeping Up With The Kardashians star looked every inch the yummy mummy in her pale pink playsuit and casual green shirt as she toted one-year-old Penelope through Malibu on Wednesday (21 August).
Her other child, little Mason, didn't appear to be with them.
Kourtney, 33, looked happy and relaxed, suggesting she's put all that recent drama surrounding her son's paternity to rest.
The reality star was left infuriated after a male model claimed he could be Mason's father rather than Kourtney's longtime boyfriend Scott Disick, based on an allegation that he'd romanced Kourtney three years ago after meeting on a photoshoot.
Kourtney, however, strongly denied this, branding the claims "ridiculous lies" and eventually agreed to a DNA test to put the matter to rest once and for all. It came out showing what she'd said all along: Scott is Mason's father.
In a statement to E! she said: "While it saddens me to have to address these ridiculous lies — especially when the truth was never in doubt — this story must be put to rest."
She implied she was unfazed by the recent drama via an Instagram post yesterday, showing herself posing alongside sister Khloe on the roof of a car. She added the caption: "We ain't worried bout nothin!"
Scott, meanwhile, was also spotted out and about yesterday in Calabasas, where the Kardashian family home is located. The businessman looked casual and relaxed in black trousers and a denim shirt as he left a bank.
As little Mason wasn't with him either, we wonder if the youngster was being babysat by a member of his famous extended family? Perhaps Kim? She gave birth to her first child North West on 15 June, 2013, and has since been keeping a low profile, holed up inside the Kardashian family home.
Is Mason Dash Disick the most stylish celeb kid around? Check out the gallery: