"Yeah, sure," he finally agreed after studying his sister's expression for too long. "When would you want to try it?"

"We're here now. I'm just here studying. And no one can see us from here."

That felt awfully sudden to her brother, who never expected they'd just suddenly strip to get used to being naked together so Ellie could meet his flaky sometimes girlfriend on a nude beach. There was an awkward moment, but before Dave had a chance to think of a reply, his sister reached for the back of her neck and started untying the top of her bikini. Within a few seconds, Ellie stripped off her bikini...