Kourtney Kardashian's boyfriend Scott Disick claims the reality star has broken their deal to get married.

The couple, who have been together for six years, are expecting their second child together any day now and are already parents to two-year-old son Mason.

In an upcoming episode of Keeping Up With the Kardashians, Scott, 28, confronts Kourtney, 33, about her hesitation to finally tie the knot.

"The whole reason I had another kid with you is because you agreed to get married," Scott told Kourtney. "You broke the contract you broke the deal."

"Obviously you're so indecisive and you go back on your word, I'm not going to keep trying with you forever."

The brunette beauty has admitted that she is scared to get married after witnessing her parents' divorce in 1991.

"I know that I'm indecisive but I'm not indecisive with you," Kourtney told him. "I'm obviously committed to us, even though we're not married, and I thought that was understood."

The duo has credited couples therapy with keeping their relationship going after a rough few years.