Turn about is fair play

"Okay!" Ruby said. "I'll do it. I'll trade you my bottoms, but you better not try anything, okay?"

"Me?" Yang asked, aghast. "Try something? Wow, that hurts. I thought you trusted me."

"I trust you to be you," Ruby muttered.

"And I never disappoint!"

Ruby bent over as far as she could without going underwater and hopped around on one foot as though trying to get her bottoms off. She waited for Yang to untie Ruby's top from her hair, but she didn't budge. Apparently she was waiting for Ruby to have her bottoms off her body and in her hand before she did anything. Well, there goes plan A.

"You having trouble?" Yang asked. "Need a hand getting all nakey for me?"

"No, I think I got it," Ruby said. "I just need a little more … yes!" Ruby lunged forward and grabbed, not her own red top, but Yang's bright yellow one. She ripped it off her sister's body, leaving them both topless.

Yang's eyes widened in surprise, but then she laughed. "Pretty sneaky, sis. I should have seen that coming." She seemed a lot less shy about her exposed breasts than Ruby had been, maybe because she was older, or maybe because her breasts were freakin' huge.

"Now we can trade," Ruby said, grinning. "Top for top."

Yang raised an eyebrow at that, then shook her head. "Sorry, you had your chance to trade, and you blew it. Fortunately, I have a perfectly good back up top right here." She pulled Ruby's red top out of her hair and put it on. It didn't fit nearly as well as the original, but it got the job done. Pouting, Ruby put on Yang's oversized yellow top … or at least tried to.