The pair have been under fire since reports surfaced that Disick, the father of Kardashian's 9-week-old son, Mason, had been unfaithful. The rumors, Kardashian said, couldn't be further from the truth.
When asked if she is laughing off the rumors, she told PEOPLE exclusively, "Yes, of course. You can't take it too seriously."
"Scott is my partner and we do everything together," Kardashian said before entering Las Vegas's Jet Nightclub.
And if they are in any kind of turmoil, you wouldn't know it from their visit to the club, which was hosting a fashion show by Dash, the clothing store she owns with her sisters. After strolling in hand in hand and kissing for reporters, the couple headed to a VIP table. There, they were spotted smooching throughout the night while Disick continually touched Kardashian's leg.
While in Vegas, Kardashian and Disick left Mason in the care of her family, but that didn't stop the doting mother from keeping tabs on her son via her cell phone and picture messaging.
"I'm like, 'What is he doing? What is he wearing? Send me pictures,' " she said. "I've only left him to go to dinner twice."