Jennifer managed, with help, to stand up and then helped her brother to his feet. Neither twin bothered to put their shirts on before wading back to the creek bank. They held hands as they made their way into the woods, where they soon found a shady spot where moss and grass grew. They sat down, then Jennifer spread the sweatshirt out and lay down on it, her hard nipples beckoning to him. Jackson lay beside her and they started kissing again.

Jennifer noticed the bulge in his shorts and, as they kissed, moved her hand to rest on it. Before today, she never would have dared to do such...