A source tells PEOPLE that Kourtney Kardashian and Scott Disick "are living together, but Kourtney is still protecting herself"

By Natalie Stone
November 21, 2016 12:00 PM

Kourtney Kardashian may have welcomed ex Scott Disick back into her home, but the mother of three is being “cautious” with her heart, a source tells PEOPLE.

With the news that the exes are once again living together, Kardashian seems to have forgiven Disick — but she hasn’t forgotten the string of indiscretions that led to their split. “She got screwed over by Scott so many times in the past,” says the source. “Kourtney is still protecting herself.”

The source continues that the 37-year-old Keeping Up with the Kardashians star “doesn’t want to say that they are back together until she knows for sure that Scott is fully committed to his family. But so far so good. Scott has been amazing to Kourtney, and she is very happy.”

Last July, Kardashian and Disick, 33, ended their nine-year relationship after he was spotted cozying up to another woman. But in the year since the duo called it quits, they are getting along great and are now living together again.

  • For more updates on the Kardashians, pick up this week’s issue of PEOPLE, on newsstands Monday

“For a long time, it really seemed like Kourtney was completely over Scott. She was acting very disappointed. It seemed she would never take him back. Then Scott decided to turn things around,” the source says of Disick’s decision to change his behavior. “It was like he finally realized that he needed his family. For the past few months, Scott has been amazing. He isn’t sober, but very well behaved. He has shown Kourtney that she and the kids are his number one priority.”

The source continues of the Keeping Up with the Kardashians star, “Kourtney seems very happy. She always loved Scott. They are living together now and are very happy. It’s all about family time. Scott seems very happy about being back with his family.”

And with the holidays fast approaching, the couple have plans to spend even more time together — including Thanksgiving with the kids!

“They are spending Thanksgiving together as a family,” a source told PEOPLE of Kardashian and Disick, who are parents to Mason, Penelope and Reign.