Kourtney Kardashian kept her pregnancy a secret for 4 weeks!

Los Angeles - Kourtney Kardashian was worried about telling Scott Disick she is pregnant again.

The 35-year-old reality TV star, who already has son, Mason, four, and daughter, Penelope, two, with her longtime boyfriend, admits she hid her third pregnancy from him for a few weeks, as she was afraid of how he would react.

In a clip for an upcoming episode of Keeping Up with the Kardashians, she says: "I definitely had to build up the courage to tell Scott because he's just been super depressed, so I just don't want to set him off."

During the episode, the brunette beauty finally breaks the news to Scott, as she is folding clothes, saying: "I just want to tell that I'm pregnant."

It seems she was right to be concerned, as Scott reacts in a negative way.

See the full clip here:

Kourtney also reveals she found out she was pregnant in March and kept it a secret until after her birthday on 18 April.

Former restauranteur Scott, 31, has been struggling to get over the deaths of his mother, Bonnie Disick, who died from an illness in November and his father, Jeffrey Disick, who passed away suddenly in January.