Pregnant Khloe Kardashian was one proud mama to be, showing off her baby bump in the family Christmas card Breaking Celebrity News exclusively learned, but her pregnant sister Kylie Jenner was hiding out.

"Khloe is hugely pregnant and is wearing baggy sweatshirts all the time in public, but privately she's super proud of her belly," an insider spilled to Breaking Celebrity News.

Kardashian, 33, and Tristan Thompson, 26, were expecting their first child together and she made sure her bump was visible for the family's famous holiday shoot.

"Khloe looks great, really happy during her pregnancy," the source squealed, "but Kylie has been totally the opposite."

Jenner, 20, is also expecting her first child , but she wasn't nearly as loud and proud as her big sis.

"Kylie if hiding out. She really doesn't do much at all. She's so used to posting sexy selfies that she doesn't know what to do with herself," the insider told Breaking Celebrity News.'

The family matriarch, Kris Jenner, 62, was micro-managing the pregnancy, reveals the source.