The 30-year-old reality TV star was quite literally swept off her feet as she frolicked in the sea with the NBA player, 26, in Puerto Mita, Mexico.
The 6ft 9in athlete effortless lifted the 5ft 2in brunette into his arms as they put on a playful display of affection.
Arriba! Kim Kardashian slipped into a skimpy green bikini for a day of beach fun with her boyfriend Kris Humphries in Mexico
Swept off her feet: The playful pair frolicked in the surf
Kiss me quick! Kris couldn't keep his hands off the star
Riding high: Kim was in great spirits as she caught a lift on her man's broad shoulders
He could barely keep his hands off her body - and few could blame him.
The star looked in incredible shape as she paraded around the beach in an array of bikinis during the six-day break.
'Kim was so excited to get some alone time with Kris,' a source told America's Us Weekly. 'They were making out most of the time.'
'This is where Kourtney and Scott met, so it's a special place,' the insider added.
Younger brother Rob, 24, tagged along for stay but sister Khloe, 26, who was recently told to lose weight by their mother Kris Jenner, and her husband Lamar Odom sat the holiday out.
The family stayed at a luxurious ocean front compound owned by Girls Gone Wild creator Joe Francis.
'We go to Joe's house every year with friends and family,' Kim says.
Making a splash: The pair spent six days together staying in an ocean front compound
While the siblings enjoyed plenty of rest and relaxation, they didn't let their fitness regime slip.
'Yes, Kim and Kourtney worked out ever day of their vacation,' a source told the publication.
The E! network stars both invest plenty of time in keeping in shape.
Kourtney hired celebrity trainer David Barton after she gave birth and Kim has recently recruited Tracy Anderson, who has worked with Madonna and Gwyneth Paltrow.
Little and large: The 6ft 9in basketball player towers over the 5ft 3in reality TV star
Stealing kisses: Kris showered his famously curvy girlfriend with affection
Getting broody, Kim? Little Mason joined the pair after a beach stroll
And she does let herself indulge in the occasional treat.
'I think, "See this little dimple of cellulite here? It was so worth it for that cookies ’n’ cream ice cream!"
Kim recently told Cosmopolitan magazine that she relies on the support of her famous sisters.
'Having a bunch of sisters is like built-in best friends,' she said. 'We pump each other up and compliment one another.
'Me and my sisters all have such different body types.Khloe is super-tall, with great legs; Kourtney is tiny with a great stomach. We embrace the fact that no one is really alike.'
Birthday girl: Kim's sister Kourtney turned 32 while the family were visiting Punta Mita