KIM Kardashian looked incredible in a sexy thong swimsuit during a family boat trip in Costa Rica.

The reality telly star, 38, showed off her enviable figure as she took to the high seas with her nearest and dearest.

10Kim Kardashian looked incredible in her thong swimsuit on a family boat trip in Costa RicaCredit: Splash News

Kim was joined on board by sister Kourtney Kardashian, Scott Disck and all their children.

The superstar siblings were even seen jetting around on a jet ski, and even Scott was having a great time with the family.

The sisters and Scott, 36, have been joined on the trip by Kourtney and Scott’s children, Mason, 9, Penelope, 6 and Reign, 4, as well as Kim’s children, North, 6, Saint, 3.

This isn’t the first time that Scott- who is currently dating Sofia Richie – has joined in on the sister’s family trip in recent months.

10She was joined by her sister Kourtney KardashianCredit: Splash News10Kourtney’s ex, Scott Disick, was also on boardCredit: Splash News10Kim and Kourtney had their kids with themCredit: Splash News10Everyone looked like they were having a great timeCredit: Splash News

In April this year, the father of three enjoyed a holiday to Bali with Kourtney, Kim, Khloe and the ‘Klan’.

The former couple have previously spoken out about their co-parenting journey, with Kourtney posting a photo of the pair, confessing how proud she was of their relationship.

She wrote: “I’m so proud of the place we’re at as parents to our children now and all the work we’ve put into getting here.”

Scott also confessed on Kourtney’s lifestyle site, Poosh: “I’d never want [her] to miss out. … We decided we wanted our kids to have these memories together as a family.”

10were even seen jetting around on a jet ski, and even Scott was having a great time with the familyCredit: Splash News10Kim kept her kids close as she set sail on the yachtCredit: Splash News10Kim looked like she was having a whale of a timeCredit: Splash News

And it seems the pair have even got to a point in their relationship where they feel comfortable spending time with each others partners.

In December last year Scott posted a photo of himself sitting in between his ex and his girlfriend Sofia, 20.

Meanwhile, Kim has been busy making waves herself as she recently posed for Vogue Japan.

The reality star continues to show off her versatility in the magazine’s August issue as she poses in a bondage-inspired dress, futuristic mask and pink silky wrap – which she penned was her “dream come true”.

10Kourtney appeared to have mastered the jet skiCredit: Splash NewsKim gave onlookers a good view of her famous derriere