Kim Kardashian is officially a mommy! The reality star gave birth to her baby girl on June 15, and is apparently resting happily with baby and boyfriend Kanye West. But her big sis Kourtney apparently still thinks Kim has no idea what being a mom really means!

“Kourtney has told Kim that she has no idea what she’s in for as a mom,” a source told RadarOnline.com. “Kim thinks that she is just going to live her life exactly the way she did before now just with a little baby along with her. But Kourtney has told her that her life is going to completely change and she’s going to be totally surprised at everything.”

Considering that Kim has watched Kourtney become a mother to wee Mason and Penelope, we’re pretty sure Kim is aware that a baby is going to disrupt her life. Sure, she couldn’t know what being a mom really means until her baby arrived, but she’ll catch on quick. But the source insists!

“Kourtney says Kim doesn’t even know the beginning of what an impact having kids has,” the source continued. “She says Kim thinks everything will be the same, that she’ll be able to do everything she did before and that her life will be as picture perfect as it always is. Except Kourtney knows that isn’t true – everything from her messy house to messy clothes and hair.”

Well, “source,” now you’re just being rude. Putting words in Kourtney’s mouth is one thing, but taking a shot at her clothes and hair? Mean! Also wrong, because Kourtney looks great. How can we trust you if you can’t even get that right?

Source: RadarOnline