The couple is currently enjoying a romantic break together in Mexico.
And the 20-year-old showed off her amazing figure as she topped-up her tan in the warm sunshine.
Meanwhile, Disick, 35, looked on admiringly as the lovebirds enjoyed their break without any of his three kids by Kourtney Kardashian present.
The couple's relationship seems to be going from strength to strength and shows no signs of ending anytime soon.
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Richie wore her blonde hair down and sported a healthy tan as she sat on a lounger.
Disick and Richie are enjoying spending time with one another in their luxury resort after he recently attended Kourtney's 40th birthday party in Los Angeles.
Kourtney Kardashian's former partner seems to be leading a healthier lifestyle these days after previously enduring drinking problems.
Sofia and her older partner chatted with one another and took plenty of photographs during their romantic vacay.
Kourtney Kardashian is now fully accepting of their relationship and allows Richie to spend time with their children.
The couple has now been together for two years after they met at Cannes and they could make things more permanent with an engagement announcement in 2019.