Irina Shayk's incredible "Orange Bikini" Butt & Ass on the luxury yachts

She might not be his biological mother but there is little doubt that Irina Shayk has bonded with her boyfriend's son.

The 26-year-old model was seen carrying Cristiano Ronaldo Jr following a day aboard a yacht in St Tropez.

Irina was seen holding the little boy, who was born by surrogate last summer, close to her chest as they stepped out in the sunshine in France.

 Worked the natural look: Even with her hair in a messy bun and not wearing make-up Irina looked model stunning

The little boy looked adorable in a backwards cap, a bright orange T-shirt and a pair of flip flops.

The Sport Illustrated model was wearing a crocheted dress and carried an oversized cream handbag.

Irina had been enjoying a day aboard a boat with her footballer boyfriend Cristiano, while family members looked after his son. 

 Dream in tangerine: The 26-year-old Russian model had spent the day aboard a luxury yacht in St Tropez with her footballer beau as she showed off her incredible figure in an orange bikini

Hardly stretching herself: Irina's lithe form was on full display as she leaned over the side of the boat alongside her boyfriend Cristiano Ronaldo

Loved up pair: Irina was seen cuddling her boyfriend as they soaked up the sunshine in the south of France

Foot fetish: The Portuguese player held onto his girlfriend's feet as they sat staring into space

Soaking up the sun: The tan-loving pair caught some rays together

Lifestyle envy much? The couple looked as though they didn't have a care in the world

Irina showed off her fabulous figure in a bright orange bikini as she lapped up the sunshine aboard the luxury vessel.

She was seen cuddling up to the Portuguese football star while enjoying the beautiful weather.

The pair weren't put off about putting on a display of PDA in front of their family in friends and it's clear they couldn't keep their hands off each other.

Fooling around: Irina was seen giggling as she put her foot up towards the footballer's torso as if she was going to push him off the back of the boat

Gingerly got into the water: Irina clearly wasn't in the mood to take a quick plunge

Continuing on from their playful behaviour yesterday the couple were seen hanging out at the back of the boat.

Irina was seen putting her foot up towards Cristiano's torso and giggling in a frisky manner.

The model appeared to be trying to push her man off the back of the boat and into the sea and she certainly found the situation particularly amusing.

Worked the natural look: Even with her hair in a messy bun and not wearing make-up Irina looked model stunning

Showing off: Irina posed for pictures while Cristiano and a male friend paused in the press up position

Just peachy: The model was seen leaning forward putting her pert rear on display

The fooling around continued when Irina was seen posing for a snap with Cristiano and a friend lay down the press up position.

Irina highlighted exactly why she was a Sports Illustrated model with her curves on display in the bright orange bikini.

The couple didn't have to worry about Cristiano Jr who was busy spending time with other members of his family.

He's in good hands: While Cristiano relaxed his son was being looked after by a woman in an orange top 

More fooling around: Irina was seen pretending to push a girl off the jetty as she made her way off the boat