Kourtney's motherhood tips to new-mum Kim Kardashian

Socialite Kim Kardashian's sister Kourtney has reportedly asked the new mother to be more careful with her lifestyle now.

Kim, 32, gave birth to her and rapper Kanye West's daughter June 15.

Kourtney, mother of son Mason, 12, and 11-month-old daughter Penelope, believes that Kim's life is not going to be the same now.

“Kourtney has told Kim that she has no idea what she’s in for as a mom," radaronline.com quoted a source as saying.

“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," the source added.