Mackenzie puts her swimsuit in the chest.

Mackenzie eased the chest open once again, just enough to slip her hand inside and store her bikini within before pressing the lid firmly down once more. It was a perfect solution in Mackenzie's mind: her hands were free to let her swim unhindered, and her bikini wasn't going to drift away and wash up on shore somewhere. All Mackenzie would have to do is swim up to the chest and pull her bikini back out once she had her fill of adventure.

Kicking away from the chest and back into deeper waters, Mackenzie's heart raced. She was putting more and more distance between herself and her modesty, and the feeling was incredible! So many people were all around her, the only thing keeping her naughty secret hidden being the sea itself. The water wasn't completely opaque, but it was far from clear. Somebody would have to get fairly close to Mackenzie to realize she wasn't wearing anything.

...How close?

A tingle erupted between the redhead's legs as the question surfaced in her mind. How close could she get to other swimmers without giving away her nudity? There were plenty of swimmers Mackenzie could approach and try to strike up conversation with. Who would be the best candidate to test this risk?