Sarah knows!

"I have to say, I was pleased to see you Ali..." Sarah explained. "When that sexy Kevin said you were his daughter I didn't believe it of course, but I played along. Of course I did, how could I not? My former bully, stripped naked and being treated like a child?! It was true good to be true! Even better, it turned out you've got the figure of a cardboard box!"

"I do not!" Ali squeaked, crossing her arms tighter over herself.

"No need to deny- everyone at this pool has seen everything, and they all barely blinked an eye!" Sarah laughed. "How did that feel, being seen naked, and nobody caring more than a chuckle?"

Ali hung her head. It of course, didn't' feel good at all. She wanted to argue, she wanted to defend herself, but what could she say? It was all true unfortunately.

"Don't worry, I won't spoil the secret." Sarah explained. "Oh, you better not tell Kevin I know you yet, or I'm going to make things a whole lot more embarrassing for you..