That Vogue cover of Kim Kardashian and Kanye West was a shock for many last week — including, even, Kim’s own sisters!

“So, it was this top-secret mission trying to keep out all of my sisters and everyone,” Kim said during a sit-down on "Late Night With Seth Meyers," which aired last night.

“That seems like it would be the hardest part,” Seth pointed out. “I can’t imagine there’s anything you could do that your sisters wouldn't know about. Were they trying to find out?”

“They were a little suspicious,” Kim confessed, “but I just said Kanye was shooting something at my mom’s house and it was really private, and just kind of blamed it on him. I don’t keep secrets!”

Seth added: “I bet in any situation where anything suspicious goes down, you can go, ‘It’s Kanye,’ and they’re like, ‘Oh, OK.’”

“I do that a little too often,” Kim replied.