Gianluca Vacchi, 53, cuddles pregnant partner Sharon Fonseca, 25, as they relax on boat in Sardinia

He has been on cloud nine ever since announcing that his girlfriend of just over one year is expecting a baby with him.

And Gianluca Vacchi, 53, looked every inch the doting partner on Friday, when he took to Instagram to share a snap of himself hugging Sharon Fonseca, 25, as they relaxed together aboard a boat during their Sardinia getaway.

Model Sharon looked radiant as she soaked up the sunshine in the shirtless Italian playboy’s arms while wearing a black string bikini.

With her raven locks tied back in a sleek bun, the mother-to-be shielded her eyes with sunglasses as Gianluca posed with one arm around her the other around their beloved pet pooch Olaf.

Captioning the image, Gianluca wrote: ‘Chilling on the boat with all the family.’

A day earlier, he shared snaps of himself and Sharon spending time on the boat with Brazilian singer Anitta, to whom he dedicated some select gushing words.

Uploading the snaps of the trio posing together, he wrote: ‘Ok, after these days I realized that if you would have been a man you would have been me, exactly me.

‘Sharon and I, loved your energy and your way to be just and simply you. Our home is your home now and forever.’

Earlier this month, Sharon shared a sweet snap of attentive Gianluca kissing her growing baby bump as she celebrated his birthday.

She penned: ‘You are so many things to so many people and yet somehow you keep evolving into the man, partner, businessman, artist, friend and now future father you always knew you could be.

‘You truly never cease to amaze me. You keep taking risks, every single day to challenge yourself even if you don’t need to get out of your comfort zone.

‘You’re the man that takes the hard road and creates opportunities for others along the way, and I will always be inspired by you.

‘Thank you for being the greatest teacher and life partner. Today I celebrate your existence king! Cheers for your birthday!’

The happy couple recently shared a video of themselves showing off their dance moves, as they stood in front of a pool toe-to-toe, before waving their arms around to Run D.M.C’s classic rap track It’s Tricky.

Gianluca and Sharon rotated their arms at a steadily faster pace while smiling at each other, as their pet pooch lounged by their feet.

The millionaire looked stylish for their sun-soaked outing as he donned a pair of blue swimming trunks that had a white diamond print. 

Last month, Gianluca said his almost three decade age gap with Sharon doesn’t ‘concern’ him in a candid interview. 

The businessman insisted he has the energy of a 15-year-old boy and revealed Sharon made him ‘suffer’ at the start of their relationship to win him over.

The pair spoke from their lavish mansion in Bologna which boasts three swimming pools and 38 acres of land, after returning from their penthouse in Miami.

Asked about whether their age difference is an issue to them, Gianluca told HELLO! magazine: ‘Not at all, if it doesn’t bother her. Even though I have this white beard, my enthusiasm is that of a boy of 15.’

The brunette beauty echoed his comments: ‘Gian is an open book, a man from whom I can learn something different every day. And then there’s his spirit and energy [like a 15-year-old’s].’ 

The couple met two years ago on the set of one of his music videos and the millionaire admitted he was struck by the ‘incredibly sexy’ Sharon.

Although the hunk revealed that she played hard to get at the start of their relationship, he joked: ‘She made me suffer a lot, that’s for sure. I thought that same night she would fall into my net, but I was wrong!’