Amazon billionaire Jeff Bezos and his bikini-clad girlfriend Lauren Sanchez canoodle on a yacht

Amazon billionaire Jeff Bezos and his girlfriend Lauren Sanchez enjoyed some sun, some sea, and some PDA while hanging out on a yacht in St. Barts this week.

Bezos, 57, and Sanchez, 51, have been on the Caribbean island since before Christmas and have been making the most of their vacation with hikes, yacht outings, and plenty of romantic canoodling.

On December 26, the couple took a boat out on the water with a group of friends, and spent some time laying out on a raft, where a bikini-clad Sanchez cuddled up to her shirtless beau who matched her in a pair of black swim trunks. 

Amazon billionaire Jeff Bezos and his girlfriend Lauren Sanchez enjoyed some sun, some sea, and some PDA while hanging out on a yacht in St. Barts this week

Bezos, 57, and Sanchez, 51, have been on the Caribbean island since before Christmas and have been making the most of their vacation

Bezos, 57, and Sanchez, 51, have been on the Caribbean island since before Christmas and have been making the most of their vacation

On December 26, the couple took a boat out on the water with a group of friends

On December 26, the couple took a boat out on the water with a group of friends

They had some one-on-one time side-by-side on a raft where they were able to soak in the sun

They had some one-on-one time side-by-side on a raft where they were able to soak in the sun

They spent some time laying out on a raft, where a bikini-clad Sanchez cuddles up to her shirtless beau who matched her in a pair of black swim trunk

They spent some time laying out on a raft, where a bikini-clad Sanchez cuddles up to her shirtless beau who matched her in a pair of black swim trunk

They were photographed kissing and wrapping their arms around one another on the boat

They were photographed kissing and wrapping their arms around one another on the boat

They were photographed kissing and wrapping their arms around one another on the boat

Sanchez had quite a few outfit changes during the outing, spending time on the boat in a black bikini

Sanchez had quite a few outfit changes during the outing, spending time on the boat in a black bikini

Sanchez had quite a few outfit changes during the outing.

The pair showed up fully dressed to the dock, Bezos still wearing black swim trunks with a green shirt — with quite a few of the buttons left open at the top.

He accessorized with a baseball cap, a necklace, and some bracelets to his yacht ensemble. 

Sanchez, walking arm-in-arm with him, was dressed in a pair of high-waisted white shorts and a beige crop top. 

The couple started out laying down side-by-side on the boat, Sanchez leaning in to kiss Bezos as they waited for the boat to depart. 

While they looked around, Sanchez ran her arm around Bezos, stroking his ear and the back of his head with her fingers.

Eventually, Bezos unbuttoned his shirt, leaving it open to show off his chest and stomach before eventually taking it off altogether.  

The pair were seen washing off with a hose, with Sanchez spraying herself on the back of the boat

The pair were seen washing off with a hose, with Sanchez spraying herself on the back of the boat

The billionaire was putting his money to use on the luxurious trip

The billionaire was putting his money to use on the luxurious trip

A dripping Bezos had just pulled himself out of the water

A dripping Bezos had just pulled himself out of the water

Bezos showed off his buff body in black swim trunks that matched his girlfriend's bikini

Bezos showed off his buff body in black swim trunks that matched his girlfriend's bikini

Bezos showed off his buff body in black swim trunks that matched his girlfriend’s bikini

Sanchez enjoyed the water as she sprayed it all over herself, with Bezos behind her

Sanchez enjoyed the water as she sprayed it all over herself, with Bezos behind her 

She gave Bezos a spray, too, pointing the water directly in his face

She gave Bezos a spray, too, pointing the water directly in his face

She also rinsed him down from behind while he patiently let her wash him down

She also rinsed him down from behind while he patiently let her wash him down

She also rinsed him down from behind while he patiently let her wash him down

The couple didn't shy away from the water, and Bezos was seen in wet swim trunks

The couple didn’t shy away from the water, and Bezos was seen in wet swim trunks

Sanchez blocked out the sun with a wide-brimmed hat, and glittered in a selection of jewelry including a necklace and earrings

Sanchez blocked out the sun with a wide-brimmed hat, and glittered in a selection of jewelry including a necklace and earrings

In swimsuits, the pair laid out together on a raft, and also stood alone on the yacht to hug and kiss.

In swimsuits, the pair laid out together on a raft, and also stood alone on the yacht to hug and kiss.

They enjoyed time out with about half a dozen other people on the yacht

They enjoyed time out with about half a dozen other people on the yacht

Sanchez beat the heat by ditching the clothes for a black bikini, wrapping her bottom half in a sheer black sarong. She blocked out the sun with a wide-brimmed hat, and glittered in a selection of jewelry including a necklace and earrings. 

In swimsuits, the pair laid out together on a raft, and also stood alone on the yacht to hug and kiss.

By the time they were back at the dock, Sanchez had changed again, this time into a sheer white button-down with a matching white sarong. 

The group appear to have chartered the luxury super-yacht for the trip. Measuring 88 feet 7 inches, it was built in 2005 and can sleep up to seven people in a master suite, two double cabins, and two twin cabins. 

The cost to charter it is $38,000 to $42,000 per week, plus expenses. 

Sunday was their second day seen out yachting on this trip. On Christmas Even, Sanchez donned a bikini with a red and white pattern for the boat ride, while Bezos wore a pink and red bathing suit covered in Hawaiian flowers. He accessorized with shades and a white feather necklace.

They enjoyed some touchy-feely fun then, too, kissing and cuddling on a raft, talking, and laughing.

As they boarded, Bezos reached out to give Sanchez a rub on her shoulders.  

The pair appeared to be enjoying the nice weather while visiting the Caribbean island

The pair appeared to be enjoying the nice weather while visiting the Caribbean island

They chatted while hanging out in the sun, with their friends sometimes joining them on the raft

 They chatted while hanging out in the sun, with their friends sometimes joining them on the raft

They'd previously been out on a yacht on Christmas Day as well

They’d previously been out on a yacht on Christmas Day as well

Earlier this week, the pair was seen canoodling on a hike on the island

Earlier this week, the pair was seen canoodling on a hike on the island

They loved-up couple enjoyed each other's company with some hugs and kisses on the yacht

They loved-up couple enjoyed each other's company with some hugs and kisses on the yacht

They loved-up couple enjoyed each other’s company with some hugs and kisses on the yacht

The couple went public with their relationship in January 2019 after Bezos split with wife MacKenzie

The couple went public with their relationship in January 2019 after Bezos split with wife MacKenzie

Bezos, who is estimated to be worth $210 billion, s the second richest man in the world after Tesla owner Elon Musk, who recently knocked him off the top spot

Bezos, who is estimated to be worth $210 billion, s the second richest man in the world after Tesla owner Elon Musk, who recently knocked him off the top spot

Bezos, who is estimated to be worth $210 billion, s the second richest man in the world after Tesla owner Elon Musk, who recently knocked him off the top spot

They certainly enjoyed some horsing around, with Sanchez climbing up on Bezos' back

They certainly enjoyed some horsing around, with Sanchez climbing up on Bezos’ back

Having a great time, Bezos offered up two thumbs up while laying on his stomach

Having a great time, Bezos offered up two thumbs up while laying on his stomach

Too much sun? At one point, Bezos looked like he was taking a nap with his cap over his face

Too much sun? At one point, Bezos looked like he was taking a nap with his cap over his face

Earlier this week, the pair was seen canoodling on a hike on the island. Both dressed in sportswear and sneakers, they stopped to enjoy the view and share some kisses, during which Sanchez appeared to cop a feel of Bezos’ behind.

As they continued their hike, Bezos slung an arm around Sanchez’s shoulders as they kept up the PDA. 

The couple, who went public with their relationship in January 2019 after Bezos split with wife MacKenzie, were quite handsy while communing with nature.

At one point, Bezos and Sanchez stopped to take a bit of a break on a bench, on which they sat side-by side. Sanchez leaned up against Bezos, resting one of her hands on his thigh, while he wrapped his right arm around her shoulders. 

Bezos and Sanchez have vacationed together in St. Barts before. In 2019, they were joined by Sanchez’s son, Nikko Gonzalez, 20. 

Bezos, who is estimated to be worth $210 billion,  s the second richest man in the world after Tesla owner Elon Musk, who recently knocked him off the top spot with a fortune of $276.2 billion compared to Bezos’s $203.9 billion, according to Forbes.

The pair didn't appear to have a care in the world on their luxury getaway

The pair didn’t appear to have a care in the world on their luxury getaway

Sanchez got touchy-feely, running her fingers along his ear and the back of his neck

Sanchez got touchy-feely, running her fingers along his ear and the back of his neck

At one point on the boat, the couple was still fully dressed, Bezos in a green button-down that showed off just the top of his chest

At one point on the boat, the couple was still fully dressed, Bezos in a green button-down that showed off just the top of his chest

Sanchez wore white shorts and a beige crochet top while wrapping her arm around her boyfriend

Sanchez wore white shorts and a beige crochet top while wrapping her arm around her boyfriend

She appeared to have swapped out the beige crochet top when she was ready to go into the water

She appeared to have swapped out the beige crochet top when she was ready to go into the water

Everyone on the yacht was barefoot during the trip

Everyone on the yacht was barefoot during the trip

Bezos showed off his chest by leaving most of the buttons of his shirt unbuttoned

Bezos showed off his chest by leaving most of the buttons of his shirt unbuttoned 

The Amazon owner first became a billionaire in 1998, the year after Amazon went public as an online bookseller and has since increased his fortune by 12,425 per cent

The Amazon owner first became a billionaire in 1998, the year after Amazon went public as an online bookseller and has since increased his fortune by 12,425 per cent

Sanchez was later seen in a white button-down and matching white sarong

Sanchez was later seen in a white button-down and matching white sarong

She seems to have changed her outfit in time to get off the yacht at the end of the outing

 She seems to have changed her outfit in time to get off the yacht at the end of the outing

The group is seen disembarking after a day out on the yacht

 The group is seen disembarking after a day out on the yacht

Sanchez, wearing a pair of brown wedges, leads Bezos in black flip flops off the boat

Sanchez, wearing a pair of brown wedges, leads Bezos in black flip flops off the boat

The Amazon owner first became a billionaire in 1998, the year after Amazon went public as an online bookseller and has since increased his fortune by 12,425 per cent — now raking in more than $140,000 per minute. 

Nearly 90 per cent of his wealth is tied up in his 10 per cent stake in Amazon — with each share currently worth $3,540.70 — with the rest of his money invested into other avenues such as Blue Origin and property.

He has made several highly-publicized donations since stepping down as CEO of Amazon in July, including to the Obama Foundation and Baby2Baby.

Just prior to Thanksgiving, he donated  $100 million to the Obama Foundation, the largest ever to the charity. The Obama Foundation gift represents less than 0.1 percent Bezos’ estimated $210 billion fortune.

As part of the gift, Bezos asked that the plaza at the Obama Presidential Center be renamed John Lewis Plaza, after the late congressman and civil rights leader who spent decades fighting for voting rights. 

Earlier in November, he pledged almost $100 million to groups working to end homelessness.  

In September, standing alongside climate envoy John Kerry, Bezos pledged $1 billion from his coffers to fight climate change through the Bezos Earth Fund foundation.