I saw her but said nothing. Hopeful she would go unnoticed, that her exquisiteness would not mar our arrival.
Then someone, I can't recall who, said, "Phwoar!" And it would have been fine, it would have been funny, except that what we didn't know then, was that girl, with her hairless, poreless body, long and hard, and yet impossibly soft and round, a thick and tawny braid snaking down her bare brown back, was not an aberration.
Oh no, she was but one glorious example, the teensiest tip of a whole iceberg of hotness.
They were diving into the waves, and shopping for another friendship bracelet to add to their collection. They were queuing for acai bowls, and riding bikes with baskets on their handlebars.
They were everywhere, yoga mats slung over shoulders, green juices in hand, wearing almost nothing. Next to them, in my bikini with its underwire and its ruching, I felt as upholstered as if I were wearing an 18th century girdle.
Their togs were not a statement but a suggestion, crocheted bikini tops merely grazed nipples, supple buttocks swallowed the meagreness of bikini pants whole.
"It's like Eat, Pray, Love," said my friend, and thank goodness for her, for she alone could share my pain. "Only," she said, "it's worse, because they're all 20-something."
We took solace where we could, in the trite and fathomless words tattooed on the backs of their necks and along their forearms. "Leave now," read one. "Or live forever and die tomorrow." In the talentless murals they scrawled along the sidewalks.
Our husbands were agog. Who could blame them?
The strange thing was there was no male counterpart to the loveliness and even if there had been, I'm not so sure a dreadlocked, barefoot, soul-searching bloke has quite the same allure.
Perhaps if all these lithe young women had appeared to be trying a little harder, perhaps if they'd worn too much makeup, or teetered on too high a heel, it would have been easier to stomach, but it was their very insouciance, their effortless attractiveness that had my esteem plummeting.
Is it because my rumpled pleats, my whiskery powderiness, are too recent a state? Has my prime too recently passed that I cannot yet admire it in others?
Do you ever reach a point in life where you can enjoy what is no longer yours without a sense of sourness? I actually thought I had. That I'd put my insecure, invidious ways behind me.
In Sydney last year, surrounded on all sides by glamour and youth, I felt for the first time not envy, but a sense of joyful appreciation.
I did not hold myself up next to those Sydney babes and find myself wanting. Maybe because I was not with my husband, did not look upon them with what I imagined were his desirous eyes, but was instead with my mother, and thus able to gaze upon them both wisely and kindly.
The annoying thing is had the shoe been on the other foot, had we travelled somewhere and found ourselves in a sea of Adonises, I'm not convinced my husband would have been all that bothered.
Is it because I wouldn't have looked? Or because he wouldn't have expected me to? Did I react as I did because self-doubt and jealousy are emotions that are primarily ascribed to women? Expected of them even?