Under the water, Hugh runs his hand down my thigh and slowly pulls me closer. Somewhere in the recesses of my brain I’m aware that there’s time to break the spell, but I can’t manage to do it. I can’t force my body to move, my attraction is too strong.

I cave into his gentle pull and suddenly our bodies are touching everywhere. A sigh escapes my lips. Hugh takes a deep breath. Ninety per cent of my brain is in an electrified heaven. Ten per cent knows this is wrong. He thinks I’m my sister. The ninety per cent takes over.

Hugh’s hands caress my hips and the back of my head, his fingers gently pulling at my hair. Our faces are almost touching. Slowly, our lips meet, furtively grazing each other. Suddenly, we’re plunged into a long, fervent kiss, both of us hungry. Our tongues are greedy, searching for the depths of one another. Our hips lock together and move in unison against each other. I bring both of my hands around the back of his head and finally get to dig my fingers into his hair. I feel him hardening through his swimsuit. I am wet in more ways than one.

I’m surprised to remember how he feels so viscerally, even though we just kissed yesterday, I feel like I’m having the best kind of déjà vu.

Hugh runs his fingers underneath the seam of my swimsuit and tugs at the string. I return the favour, slipping my thumb down the front of his waistband. He slips his hand over the front of my bikini and palms my breast, his finger caressing my nipple. I gasp. More, I think. I want more.

Our breathing becomes laboured, both of us focused on each other and not enough on staying afloat. A wave crashes over the top of our heads and drenches us, bringing the moment to a crashing halt.

We separate underwater, both of us pulling ourselves to the surface to take in gulps of air.

Hugh looks at me with a glint in his eye and inclines his head towards the boat. ‘How do you feel about going somewhere a little—’

He’s interrupted by another wave that surges around us.

‘Less choppy?’ I supply, once we’ve both caught our breath again. He nods, a wicked grin spreading across his face. ‘Race you to our room,’ I say, diving under and kicking as hard as my fins will let me.

Hugh is fast to follow, grabbing for my ankle with his fingers and barely missing, his fingertips dragging along my foot, the touch enough to make me want to wrap my legs around him all over again.

We reach the side of the boat at the same time, breathless. I reach up for the ladder rungs and Hugh trails his fingertips up my inner thigh under the cover of the water.