Kourtney Kardashian took daughter Penelope and son Mason to Pedaler's Fork in Calabasas on Sunday for brunch, and we're not sure where Scott Disick was, but Kourt didn't seem to mind!

And even though we've heard rumors for quite some time that the 35-year-old reality star is having a boy, it was finally confirmed it on last night's episode of Kourtney and Khloe Take the Hamptons.

It was actually Mason who broke the news to the family, and auntie Kim videotaped the moment when the 5-year-old revealed his unborn sibling's gender. Mason ran into the room with a blue stick with a star on it, but after that there was an awkward exchange with Scott and Khloe. "You’re not that excited?" Khloe asked when Scott appeared disappointed that he wasn't having a daughter. "No, I’m fine now," Scott replied. "I’m excited.”

And he wasn't the only one! Mason admitted that he wanted a little sister, but Khloe was able to change his mind. "Girls don't like aliens and Lego guys," she said. "When you have a brother you can say 'Look at all my Lego guys, brother.' You get to be rough and you can boss him around because you're the older one." Ha!