A Sister's Secret
You are Jesse, a young male of 12, still exploring your sexuality. You've had some innocent fun with girls your own age, but you've also found yourself interested in girls much younger too. Fortunately for you, you have a younger sister you find yourself frequently fantasizing over. And being only 7, Sarah is quite often running through the house around bedtime or after a bath wrapped in a towel or in her panties.
Naturally, this has given you plenty to fantasize about. But you can't help but think about taking things further. Unfortunately, while you and your sister are rather close, you are worried that if you could somehow convince your sister to do something sexual with you, she would end up telling your parents in the end. So up until this point, you've kept things innocent, finding opportunities here and there to catch her changing or rub up against her "accidentally."
One night however, you lie awake in bed and your thoughts dwell on your sister. Earlier that evening, she had her door open when she was changing. Not being a particularly shy child, this was not all that uncommon. Pretending to simply be walking by, you peered inside as she stripped off her towel after a bath.
As you lie in bed, you can't get your mind off of her exposed pussy. It looked so sweet and inviting and your cock is rock hard as you imagine what it would be like to have been able to walk in while she was changing and run a finger along her slit. You are about to masturbate to the thought, when you suddenly have a better idea. It's late and your parents are already in bed. You know your sister is a sound sleeper and rarely wakes up to anything. So what's the harm in jerking off in your little sister's room?
Deciding there was very little risk, you quietly get out of bed and head towards your sister's room, eagerly rubbing your cock through your pajama bottoms.