Kourtney Kardashian

Kourtney Kardashian, 44, shares three children with her former partner, Scott Disick - Mason, 13, Penelope, 11, and Reign, eight.

Kourtney - who is currently expecting her first child with husband Travis Baker - admits she had to dump Scott because of his "substance abuse".

Appearing on her family's reality show, Kourtney said: "I think the substance abuse was a deal-breaker."