Stepsister Plus Stepbrother Equals Trouble

"Everyone knows that stepbrothers and sisters shouldn't be left alone together!"

Everyone knows that stepbrothers and sisters shouldn't be left alone together, but sometimes things happen. The family reunion is a time where many people splinter off and do their own thing, so no one even notices when the blonde sneaks away with her new tall and black stepbrother in, " Stepsister Plus Stepbrother Equals Trouble."