The season 11 finale of Keeping Up With the Kardashians saw Scott Disick return after his stint in rehab for drug and alcohol treatment, to a very wary Kourtney Kardashian.

While her other sisters dealt with their own worries in the episode -- a breach birth for Kim and finding the right care for ex-husband Lamar Odom for Khloe -- Kourtney had to figure out how she felt about the impending return of her former love.

WATCH: EXCLUSIVE PICS: Inside Scott Disick's Wild Night of Partying With Mystery Blonde

"I just don't really know how to be yet," Kourtney admits at one point. "It just takes time to figure out how to be together and co-parent our kids together. I don't think 30 days is enough for me to trust the situation."

Disick, father of Kourtney's three children -- Mason, Penelope and Reign -- was in rehab for the fourth time and the reality star has been recently spotted partying hard since the finale was filmed late last year.

Kim and friend-of-the-family Jonathan Cheban grilled Kourtney about her plans, after she revealed she was attending once-weekly therapy sessions with her troubled ex. "Does that mean you want to work it out?" Cheban asks?

"I want to have a relationship with him for my whole life," the 37-year-old responds, although she indicated her children were thepriority.

Kim, however, had made up her mind: "I hope she's strong and sees the bigger picture and doesn't just jump back into a relationship with him."

Scott turned up at the end of the finale to grab some juice from the fridge and complain about the comfort of the couch, while Kris makes a polite exit to leave the family alone.

WATCH: Kourtney Kardashian Shares Racy Revenge Body Selfie After Ex Scott Disick Parties in NYC

For Kourtney, however, cautiousness was key. "Seeing Scott, I don't know. I'm really proud of Scott for being in rehab for 30 days, but he's just out and I don't know what's going to go on," she says.

"I don't know want to end up in the same situation I just got out of."

We hear you, sister.

For the latest on what's up in Kourtney's life -- and her rockin' abs -- there's more in the video below.