Not like that's anything new, though!

Kourtney Kardashian ran errands with son Mason yesterday, and we've got to hand it to the reality star for basically being a single parent. Although Scott Disick is still in the kids' lives, he's been prioritizing partying and womanizing in recent weeks. In fact, just this past weekend, he was spotted wasted and begging for oral sex at a Hamptons bar.

The mother-of-three and her baby daddy have struck an agreement about co-parenting, but she's not very hopeful that he will abide by it.

"She wants nothing more than to have him live by his word, but she still has it at the back of her mind that he will disappoint her. Kourt needs to have him in her life because of the kids since they always ask for him, but she still thinks he will mess up again. She hopes not, but he has disappointed her before so she expects it again," a source dished to Hollywood Life.

The eldest K sister has totally shut the door on a reconciliation, though.

"Kourtney always ends up forgiving Scott, no matter how badly he has behaved, he’s her kryptonite. That said, Kourtney has finally gotten to the point where she no longer wants to be in a relationship with Scott, she’s finally managed to realize it’s never going to work," the source added.

We wonder how long it will be before she introduces boy toy Younes Bendjima to her brood?