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Kissing cousins, indeed!

North West and Penelope Disick have apparently been spending some time o a joint business venture this summer: a lemonade stand.

On Friday, Aug. 12, Penelope's mom, Kourtney Kardashian, shared a few Snapchat videos of the adorable cousins working on their drink sales.

"It's one dollar?" Kourtney asks in one clip as North holds up a sign -- upside down -- that reads "organic.' "OK. Can I have some lemonade for me and Rob?" Kourtney asks before hollering, "Customer!"

North, 3, and Penelope, 4, have been BFFs since they were babies, sharing ballet classes, Halloween dress-ups and more sweet moments together almost since birth.

"Whatever secret language u girls speak, the way you girls protect each other & love each other is so special," Penelope's mom, Kourtney, captioned a video clip of the lemonade-hawking pair. "Penelope, North is so lucky to have a best friend like you! Happy Birthday my sweet P. I love you to the moon and back!"

Earlier this summer, Kourtney and her ex, Scott Disick, took their kids to Nantucket for a little New England-style summer vacation -- at an eight bedroom mansion AirBnB rents for $6,6000 a night.

North's mom, Kim Kardashian West seems to have been too busy getting back to her pre-baby goal weight this summer to take much time off.

"Having a positive self-image has always been important to me because it affects so many aspects of my life: my work, my relationship with my husband and my life as a mom," she wrote on her app.

"After I had [daughter North West], there was a part of me that was nervous about whether I'd be able to get back to anywhere near my pre-pregnancy weight and feel confident again, since I was now 50 pounds heavier. I knew I had to put in a lot of work, but I got there—it took me a good six or seven months. After 10 months, I felt like I was even better than before. I was curvier. I really felt like all the hard work paid off."