The showbiz couple - who have two-year-old son Mason and are currently expecting their second child - admit they do not have the ''perfect'' relationship and believe the advice of professionals has helped them stay strong.
She said: ''He's grown so much over the years. I love seeing him as a dad - he's great with Mason - and I'm not saying that we're perfect. We go to therapy, which helps us a lot. I think we're always working to better ourselves, which I think a lot of people can do.
''I could go into the therapy session despising him, but by the time I leave - even if he's not in there - I feel like I understand him so much more.''
Scott has been with Kourtney for much of the last five years, but is still unsure if he ''deserves'' someone as good as her.
He told Oprah Winfrey: ''She's pretty fantastic and doesn't do much wrong. It would make my life easier if she made mistakes. I probably don't deserve such a good person, but she makes me better, so in that sense I do deserve that.''