The couple have a two-year-old son Mason together and are expecting a daughter this summer but Scott insists the only reason he agreed to have another child was if they got married and says his girlfriend has "broke the deal" they had.
On Sunday's (01.07.12) episode of 'Keeping Up With the Kardashians', he says: "The whole reason I had another kid with you is because you agreed to get married. You broke the contract – you broke the deal."
However, despite her reluctance to walk down the aisle, Kourtney tells Scott she is committed to their relationship.
She says: "I know that I'm indecisive but I'm not indecisive with you. I'm obviously committed to us, even though we're not getting married, and I thought that that was understood."
Kourtney and Scott recently revealed they are in therapy in order to keep their relationship 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."
