We lay down together, as we always did, on our sides facing each other with Laura's head nestled under my chin. Just like I did every night I ran my fingers lightly through Laura's hair and across her shoulders and, as always, Laura gave me a sweet little giggle and nuzzled her face deeper into my chest. Laura was asleep within minutes but even after the flight, the long night, and one hell of an orgasm, I still found myself unable to sleep. I tried drifting off but all I could think of was Mark lying in his bed by himself, and I'm sure awake, wishing his big sister was...