They've done the deed on Ernesto's Island and follow up with skinnydipping.
Notes: I've always liked this scene a lot. It's sweet and intimate. Jack is not over-the-top jokey and is actively contributing to the afterglow. And Jenn...she, like Kayla, had to do a lot of the heavy lifting early on. It's nice to see her get a compliment without a punchline. Hope's reaction to them au naturale is also very funny.