After 10 years of decade of dating, three kids and a million mixed signals, Kourtney Kardashian has finally told Scott Disick in no uncertain terms:

It. Is. Over. Move. On.

Scott Disick, Kourtney Kardashian

In news that may sound like it’s six years too late (better that than never), insiders say that she’s done treating her baby daddy like a baby.

Kourtney has long worried how he’ll react to her every move and word, and has felt like she’s walking on eggshells with regard to Scott.

No longer.

Kardashian, 38, loves and respects the father of her three adorable children, but in terms of wanting more from him, she simply doesn’t.

His raging jealousy is why she hasn’t posted anything online about who she’s dating (hence all the secret hotel sex with Younes Bendjima).

After all, Kourtney being seen with slash Kourtney banging Justin Bieber and other men has triggered him into epic benders in the past.

Kourtney, Scott Pic

As for current boy toy Younes, with whom she was recently seen in Bev Hills, she says Scott’s friends see her and report back to him.

To put it simply, she’s done with all the sneaking around, especially with Scott off the wagon and desperately in need of rehab (again).

Insiders say Scott dating Ella Ross and/or other teenage models is just a front, or a means of masking the internal turmoil he won’t admit.

Friends are worried about Disick drinking himself to death after he was shut down for the 120th – and seemingly, last – time by Kardashian.

Regardless, Kourtney is determined to live life on her terms going forward, and is telling Scott he needs to get over it and get on board.

End of discussion.

Kourtney Kardashian and Scott Disick Instagram

If you watch Keeping Up with the Kardashians online, you know this has been playing out for some time, and Scott has been in RARE form.

Approximately 45 seconds after gushing over the mother of his kids in Dubai, he heard she was seen with Younes from a friend via text.

Soon enough, he was caught by Kim with a “whore” in his hotel room … then invited another girl to the Kards’ family vacay in Costa Rica.

On last night’s episode, he was called out over both incidents. Disick, playing the victim, admitted he “did something wrong … as always.”

Kourtney wasn’t buying it: “You had your chance. I thought we were spending our whole lives together, and I’ve done everything I can.”

Disick’s response to that?

Scott Disick: Awkward

“I’m a sex addict,” the 33-year-old said.

“I’m a f–ked up, horrible sex addict.”

Khloe wasn’t buying that one.

“If you need to get your d–k wet that badly, then get your f–king d–k wet,” Kourtney’s sister replied, throwing a glass of water on him.

Vintage Khloe. Scott later patched things up with her, and to a degree with Kourtney, but romantically, he passed the point of no return.

Kourtney summed it up this way:

“Scott’s so lucky, because I am the coolest baby mama on the planet. The stuff that he’s done and I still allow him to come on our family trips?”

This Ain't Good

Despite their shared history – and their undeniable bond for the rest of their lives in the form of their kids – she just can’t even with him.

Kourtney told her younger sisters:

“I just feel like I need to have a conversation with him just to finally say we will never be back together. It’s probably better for both of us.”

Then she made good on that.

“I think something I’ve learned is that we need to move on,” she said. “I think the moral of the story is we are never getting back together.”

Obviously, Disick was less than thrilled … but perhaps putting it so bluntly and squashing all hope will at least halt his emotional rollercoaster.

For his kids, and for himself, that much we can all hope for. Dude needs to pull his s–t together, because this is a dark path he’s on.