The siblings walked down the beach and, as Rob had predicted, they soon became chilled. Both of them had worn shorts and short-sleeved tee shirts.

"Brrrrrrr!" I'm cold, Dinah complained.

"Um..."

"I know. Shut up! You told me so. Warm me up!" she said as she snuggled into her brother's chest and put her arms around him.

Rob put his arms around his sister and pulled her close to him as she burrowed her face into his chest. He reflected that anyone seeing them might assume they were lovers, but he didn't care. Nobody knew them here. He thought that the next day, when his pretty sister came to the...