[MFN]

My wife, whilst still my girlfriend, and I were on a friend's boat with 3 other couples. As soon as the couple we didn't know well went down into the cabin, leaving the rest of us on the deck, my girlfriend for no reason at all stripped off to enjoy the sun. We knew the 2 remaining couples fairly well and she'd even previously been intimate with one of the husbands, but the other guy was now seeing her naked for the first time. Both the wives had seen her nude before, so no big deal there. So, my girlfriend was the only one naked, and remained so for over two hours, just carrying on as though she were clothed, chatting and eating with us, until the couple from below returned, then she covered up. So, indeed they saw her naked also, but only as she got back into her bikini.

This was the first time other men saw her naked with me present, and her being casually naked among friends who kept their clothes on just intensified the thrill.