She does

Penny was being so caring right now, maybe she wasn't sex crazed and mischievous as Briana thought. Although she could be wrong. So many things to weigh up, so little time. The tide was rising and pretty soon they wouldn't have their rock to lean up against. Briana was starting to think of it like a band aid. Just get it over with she thought to herself. In any scenario it would probably be bad for Briana, so she thought now was as good a time as any seeing as Penny seemed so understanding right now. Briana wasn't "Brian" but maybe Penny would understand the whole situation was as mortifyingly embarrassing as anything to Briana that she could imagine.

Still grasping onto the rock and partially holding briana's arm for stability, Penny continued looking around for the missing trunks. After a few moments, Briana knew it was a lost cause and pulled the pin right there and then.

"Penny, it's okay. They're gone. I-It's a clothing optional beach after all." Briana gave a slight nervous giggle at that thinking about the bombshell she was about to drop.

"I know, but you seemed so upset and I didn't want you to be disappointed in me. I just wanted to make it up to you by finding those darned trunks."

"Look, I just want you to know that this was all Stacey's idea.. please don't be mad." Briana said softly.

"What are you talking about?" Penny said as she stopped looking around in her search for the trunks.

"M-my name's not "Brian". It's B-Briana."

Penny looked directly into the other nude ladies eyes visibly confused. Then slowly moved back half a foot and looked down beneath the waterline towards briana's crotch. Penny's mouth opening widely in shock. All the fuss about keeping the trunks made sense now.

In a shocked stuttering voice Penny began "W-what!? B-but you said.. wait so that's why you didn't want to get naked!?"

"Yes! Of course that's why. You aren't mad are you?"

Penny was speechless for a few moments. She looked downward towards the water, then left and right before finally looking back to Briana.

"I wish you told me sooner!"