Elon Musk looks carefree as he enjoys a boat day in Mykonos with a bikini-clad brunette beauty

He recently revealed that he has fathered ten children with three different women.

And on Friday, Elon Musk51, looked carefree enjoying a boat day with a bikini-clad brunette beauty while on holiday in Mykonos, Greece.

The multi-millionaire businessman arrived on the popular Greek island with a group of friends, including the mysterious brunette in yellow.

The founder of SpaceX and the CEO of Tesla kept things casual in a plain green/grey T-shirt and black swim shorts, with a classic pair of aviator shielding his eyes.

The mystery woman whose company he enjoyed turned heads in a skimpy crotch over yellow bikini top teamed with a matching slinky skirt.

The tanned beauty showed off her washboard abs in the colorful combo and completed her look with a stylish beach bag and cat-eye shades.

Elon and his friends enjoyed a meal at Spilia Seaside Restaurant before taking in the sights of the picturesque island on their private boat.

In March, it was reported that Elon was in an “on-off” relationship with Australian actress Natasha Bassett, 27, after meeting on the Los Angeles social scene.

Confidential reported that the couple, who were seen disembarking from Elon’s private jet after his plane landed in… The Angels in February have known each other for a while.

“Elon and Natasha have been in an on and off relationship for a few years,” said one alleged source. Confidential.

“I think their relationship is kind of tumultuous, especially now that he has the same kind of on-again, off-again relationship with Grimes.”

Daily Mail Australia contacted Elon Musk for comment.

In May, Elon and Natasha were spotted having a meal at the Cheval Blanc hotel in St Tropez, where rooms cost more than $1,300 a night.

And in that moment it looked like she had been well and truly embraced by Elon’s family, attending multiple Cannes events where his model mother Maye was also a guest.

The pair supposedly attended the premiere of Bassett’s new movie, Elvis. She plays one of the singer’s girlfriends in the biopic.

The actress moved to the US from Australia at the age of 19. She first worked in New York and then traveled to LA. It is unclear how she and Musk met.

Earlier this month, Elon tweeted: “Doing my best to help the underpopulation crisis,” it sounded. “A collapsing birth rate is by far the greatest danger facing civilization.”

He added: ‘I hope you have big families and congratulations to those who already have!’

His tweet came when it emerged that last November he was quietly welcoming twins to Shivon Zilis, 36, a senior executive at one of his companies.

In addition, they arrived just weeks before Musk had a second child via surrogate with his on-off girlfriend Claire Boucher, aka Canadian pop star Grimes.

Musk’s two children with Grimes are two-year-old son X Æ A-Xii (pronounced ‘X-Ash-A-12’) and seven-month-old Exa Dark Sideræl. They are called X and Y for short.

The Tesla mogul also has five children with his first wife, Canadian author Justine Musk.

A sixth child, their first, died of SIDS in 2002 aged ten weeks, forcing them to use in vitro fertilization. Then Justine gave birth to twins – Vivian and Griffin – in 2004, followed by triplets – Kai, Saxon and Damian – in 2006.