Seemingly with cocktails flowing, the couple got wet and wild aboard a yacht dressed only in swimwear and furry animal masks, and then gave a glimpse of all the action to their followers on Instagram.
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In one photo, the pair showed off their provocative sides by showing Robin grinding his ladylove from behind with the cartoon-like masks on.
Geary, 24, can be seen flaunting her derriere by bending over and leaning onto a bench-seat dressed in a hot pink bikini and a neon light blue mask.
The Lost Without U crooner, 42, is right behind her in black swim trunks and a panda mask, giving the impression that he's thrusting her while holding on to his drink.
There's also an up-close view of the mother-of-two sneaking a sip of her drink from underneath her animal head.
At one point she scrapped the animal head for a traditional sailor's hat and a pair of stylish dark sunglasses.
Another snap revealed at least three other furry animal masks that included the colors: neon light blue, pink and black.
Before the excursion on the ocean, Love shared a photo of herself looking directly into the camera dressed in a cream-colored ensemble.
There's also two sweet snaps of Thicke, elegantly dressed in a black suit, holding five-month-old daughter Lola in his arms with the caption: 'MY HEART.'
The couple got engaged this past Christmas Eve, and are also the parents to 17-month-old daughter, Mia.
The Grammy-nominated musician is also dad to nine-year-old son Julian from his marriage with actress Paula Patton.
