The first thing you feel as you start to awaken are a pair of soft, delicate hands on your chest. You can tell immediately that they're girls hands, which confused you greatly as you have no clue why a girl would climb into bed with you! The girl in bed next to you groans, and you feel her move off the bed. "Come on, sweetie, get up!"
You freeze. You recognize that voice - it's oh so familiar, but you just can't remember who it is. Opening your eyes, you have to adjust to the sudden light as the girl flings open the curtains. After you lower your hand, you see how the girl really is - it's your sister, Louise!
You remember she didn't come home last night, leaving a message on the answerphone about staying with her boyfriend, Dean. You've only met Dean once or twice, but he's got dark ginger hair, almost a maroon color. He also seems to be quite physically fit, although with it being your sisters boyfriend, you don't want to get a good look, because it feels wrong. He's also four years older then you, eighteen, and is in all the same classes as your sister.
"Lo - Louise?" you stutter out, mortified. She smiles, walks over and pushes you back down onto the bed. She climbs over you and plants a kiss on your lips. You try to push her away, but the sensation of her lips on your mouth is too strong and she pushes you back.
You stay like this for several seconds, before she smiles mischievously at you, gives you a peck on the lips and quickly saunters out of the room. You lay on the bed for several moments in shock, before standing. Looking over yourself, you notice that something is different. You're even taller then you were before, and your chest is formed into a six pack. That certainly wasn't there before you went to bed! Also, your cock is now eight inches flaccid, and it's half hard.
Your eyes widening, you dart in front of the mirror. And then all this madness is explained at once - you're your sisters boyfriend, Dean!