They were down for the count, instantly smitten, love at first sight.
The birth of Mason Disick, also Kris Jenner's first grandchild, not only officially meant the arrival of the Kardashian family's next generation, but it also sparked the stirrings of maternal instincts in all three Kardashian sisters.
"Kourtney didn't even like kids," Kim told Ryan Seacrestat the time. "I never thought she'd ever want to have a baby." But "I think Kourt's going to be the most amazing mom."
That prediction certainly came to pass. And with the next generation now numbering six as of today with the arrival of Blac Chynaand Rob Kardashian's first child together, daughter Dream Kardashian, you couldn't imagine a more loving, doting, devoted and protective trio of moms and aunts than Kim, Kourtney and Khloe.
Let's just say... Dream hit the auntie jackpot.