One of their friends shared a video of the moment on Instagram, capturing Disick and Richie kissing each other on the lips. And-what's more-a dessert plate with writing that read, "Congratulations Scott and Sophia", could be seen in front of them.
Her name is spelled wrong - but the message of clear.
The trip comes one week after a source told PEOPLE that Disick and Richie have been "inseparable". The reality star posted a picture of himself nuzzling Richie's neck, while Richie shared a snapshot of herself and Disick walking on the beach.
He and his new, much younger, girlfriend Sofia Richie appear to have made their relationship official on Instagram over the weekend.
The couple have been spotted out-and-about together for a while now, but it's only after the pair of them took to their individual social-media profiles with some loved-up pics that it become apparent their romance is official. Sofia contributed to it too, with a similar photo on her Instagram story where they posed with arms locked around each other.
Scott has previously referred to Kourtney, the eldest Kardashian sister, as "the love of his life" even when they weren't together, and had remained close with the family regardless of whether or not he remained with Kourtney.
"It's obvious that she looks up to Scott. Scott takes care of her, opens the auto door and pays for everything".