In the end, Kourtney Kardashian was left with virtually no other choice.
Yes, she had dealt with Scott Disick acting like a douchebag before, saying dumb things and drinking way too much.
But now there was photographic and video evidence of Disick cozying up to ex-girlfriend Chloe Bartoli in France, along with strong rumors of him drinking and partying while away from his family.
"She was over dealing with his constant lies and addictions," a Kardashian insider tells People of Disick. "It was becoming a poor environment for the kids to be raised in and she refused to let that be the case."
And that's really what left Kourtney with no choice:
The former couple has three little kids. How could she let them grow up around a father who sets this kind of poor example?
For the past several days, Disick has been having himself a blast in Monte Carlo, hanging on a yacht and in various clubs with Bartoli; while also going on a bender with underage girls.
"He acts out, he rebels, he drinks too much and he embarrasses her," another insider tells the magazine.
"He just rebels against the crazy responsibility of having three kids and makes Kourtney do it all."
Disick checked into rehab earlier this year, but it was never clear whether he stuck around for his entire stint.
The reality star has never taken his drinking issues very seriously, that's for sure.
"Kourtney is willing to sacrifice her relationship with Scott in order to keep [her kids] safe," concluded the source.
"Her children are her first priority. She needs to protect herself and her family, so she knows this is the right decision