Most of the furore got caught on camera for one of the KUWTK spin off shows. Always worth noting.
The couple - who are currently renting a property in the Hamptons while filming Kourtney and Khloe Take the Hamptons - had a furious row about his constant partying, which led to the 35-year-old brunette ordering her long-term partner out of the house on Saturday (14.06.14).
Kourtney - who is pregnant with the couple's third child - is said to be especially upset with Scott as when he drinks he loses the rag a bit. Then again, he lost both his parents within a short period of time last year.
Despite the row, friends of the pair insist it won't mean the end for the couple - who have four-year-old son Mason and 23-month-old daughter Penelope together - as they regularly get into arguments over the same topic.
A source told website TMZ: "Same old s**t. They fight, get back together, he parties, she doesn't like it."
It is unclear whether Kourtney has allowed 31-year-old Scott back into their house yet but she sent him a message via Instagram on Father's Day.
She wrote: "Thanks for being a loving daddy more than anything else." Bit barbed. Would explain the repeated unexpected pregnancies.