Scott Disick has a confession: he hasn't kept his promise to remain sober.
In a sneak peek from Sunday's all-new episode of Keeping Up With the Kardashians, Disick, 28, tells girlfriend Kourtney Kardashian that he "didn't lie, but I kind of kept some of the truth from you about that time when I went with all the boys to Vegas."
"I didn't get out of control," he tells her. "It's nothing crazy, but sitting here in Tahiti makes me think I wouldn't mind having a drink or two because I believe that I'm in a place that I could have a drink or two responsibly and not get crazy."
"It's hard for me to trust you because of everything's that gone on," she explains, "and I don't want it to get back to that place."
Keeping Up With the Kardashians airs Sunday at 10 p.m. EST on the E! Network.
For access to all our exclusive celebrity videos and interviews – Subscribe on Youtube!