Sofia Richie, 19, shows off her perfect bikini body

Sofia Richie showed off her perfect bikini body as she tanned herself in Mexico with Scott Disick.

The teen beauty wore a black string bikini as she stretched out in the sunshine on Sunday.

High cut at the waist, it highlighted her trim, toned figure, with Sofia clearly in great shape.

Vac cay time: Sofia Richie, 19, shows off her perfect bikini body as she suns herself with Scott Disick in Mexico on Sunday

In great shape: High cut at the waist, her bikini highlighted her trim, toned figure

In great shape: High cut at the waist, her bikini highlighted her trim, toned figure

Her bleached blonde hair was worn tied up in a practical bun style as she relaxed. 

The 19-year-old daughter of Lionel Richie and her 34-year-old beau were seen relaxing side by side on loungers.

Father-of-three Scott, who wore red swimming trunks, chatted away to his youthful companion, who kept herself occupied with an iPad.

Sunshine seeker: The teen beauty wore a black string bikini

Sunshine seeker: The teen beauty wore a black string bikini

In great shape: High cut at the waist, her bikini highlighted her trim, toned figure

 Weekend lounging: The model jetted off to Los Cabos on a private jet on Friday

The two jetted off to Los Cabos on a private jet on Friday.

Sofia shared a snap of her large Hermes Birkin bag and Scott’s Louis Vuitton backpack to her Instagram story.

Meanwhile Scott posted a photo to Instagram showing off the plane.

Despite the happy scenes, sources tell People, the relationship is ‘starting to fizzle.’

Couple time: The 19-year-old daughter of Lionel Richie and her 34-year-old beau were seen relaxing side by side on loungers

Couple time: The 19-year-old daughter of Lionel Richie and her 34-year-old beau were seen relaxing side by side on loungers

Despite the happy scenes, sources tell People, the relationship is 'starting to fizzle'

Despite the happy scenes, sources tell People, the relationship is ‘starting to fizzle’

Not so good: The magazine's source added that 'they're starting to argue more' and that it's 'bothering Sofia'

Not so good: The magazine’s source added that ‘they’re starting to argue more’ and that it’s ‘bothering Sofia’

Young love: Sofia and Scott went public with their romance in late September, however they were linked as far back as May

Young love: Sofia and Scott went public with their romance in late September, however they were linked as far back as May

Another break: Just weeks ago, Sofia and Scott jetted off to Milan and Venice, Italy for a brief holiday

Another break: Just weeks ago, Sofia and Scott jetted off to Milan and Venice, Italy for a brief holiday

The magazine’s source added that ‘they’re starting to argue more’ and that it’s ‘bothering Sofia.’

People’s insider said that the teenager thought Scott ‘would be more serious about their relationship’ but she’s getting ‘more frustrated with him as time goes on.’

Adding: ‘Everything everyone has been telling her to look out for, she’s starting to see for herself.’

Sunday funday: The two had plenty to talk about

Sunday funday: The two had plenty to talk about

Toweling off: The couple appeared to have taken a dip together

Sofia and Scott went public with their romance in late September, however they were linked as far back as May.

In September, they spent time together during a romantic trip to Miami.

Scott and the teen enjoyed a PDA filled trip to Puerto Vallarta, Mexico at the start of October.

Just weeks ago, Sofia and Scott jetted off to Milan and Venice, Italy for a brief holiday. 

 

Read more at DailyMail.co.uk