During a promotional interview for her and sister Khloe’s reality series, Kourtney & Khloe Take Miami, on The TODAY Show Thursday, Kourtney Kardashian revealed that she is expecting her first child with on-again/off-again boyfriend Scott Disick this December.

“He was actually excited,” Kourtney said of Scott’s reaction to the pregnancy news. “I think he has moments where he’s really scared, but he was way more excited than I was.”

“Khloe was so excited. [Kim] definitely thought it was going to be her [getting pregnant] first. Trust me.”

The Kardashian’s new show premieres this Sunday on E!.