Kourtney Kardashian has changed the locks on her Calabasas home.
The 'Keeping Up With The Kardashians' star reportedly doesn't feel "safe" around her ex-partner Scott Disick.
A source said: "Kourtney does not feel safe because of Scott's current condition and she is having him locked out of the property.
"He is obviously hurting a lot but the fact that he is showing such blatant disregard for her feelings and for the well-being of their kids has really p****d her off."
The 36-year-old television personality is also said to be "beyond hurt" after her split from the 32-year-old model, with whom she has three children, Mason, five, Penelope, two and Reign, six months.
The insider added to RadarOnline.com: "She is beyond hurt now right now and she is ready to play hard ball."
Meanwhile, a source previously claimed Kourtney had "dumped" Scott after seeing photographs of him getting close with Chloe Bartoli.
They said: "Kourtney dumped him after she saw the pictures and he hasn't been home after a month-long party binge.
"Kourtney has always taken Scott back and been by his side, but now with three kids it has gotten old. Kourtney has to do what's best for the kids."