Scott Disick wants to marry Kourtney Kardashian.

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 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. "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," she said.