The 42-year-old, who also posted a selfie of the her fiancé with her tots, enjoyed watching the sunset with her brood.
"Family over everything," the musician wrote in the comments section, to which Kardashian replied with a praying emoji and black heart emoji.
Other fans loved the sweet interaction. One person wrote, "cute family portrait 😙," while another added, "This is EVERYTHING 🖤."
A third person gushed, "True love."
The two first sparked dating rumors in January 2021, and the drummer ended up proposing in October.
Recently, Barker and Kardashian spent Christmas together as a blended family. (The mom-of-three also shares son Mason, 12, with Scott Disick, while Barker shares son Landon Barker and daughters Alabama Barker and Atiana De La Hoya with ex Shanna Moakler.) ‘Twas the night before Christmas," the Keeping Up With the Kardashians alum captioned some sweet shots via Instagram.
Now, it seems like the Hollywood stars are in wedding mode!
As OK! previously reported, the Poosh founder “has hired a writer and a videographer to re-create all the magical moments of their time together,” an insider spilled.
“They’re going all out and plan to make their nuptials as extravagant and romantic as possible,” the source continued. “The idea is to stream their love story, filled with nonstop PDA, of course, so guests can watch it before and after they say their vows."
Meanwhile, the Blink-182 member, 46, "is writing a gushy speech that will list all the reasons he worships Kourt," the source revealed, adding that they “don’t care if people think it’s over the top. They think everyone should be so lucky to have that insane chemistry and passion in their lives."