Getting Naughty With My Sister On My Lap While Our Parents Drive: Brothers Breeding Sisters 35

Dad sized up the big boxes he wanted to ram in the car. It only took one look to know that they wouldn't fit in the back, not when my sister and I would both be seated there. "Well," Dad began with a huff, "Emily it looks like you'll have to sit on your brother's lap for the drive there." Holy hell. Was I really about to get that lucky? It was going to be one hell of a drive.