Simple Agreement

Chapter One: The Plan

Derek's POV

Derek slowly crept out of his room and walked silently down the hallway towards the hall closet. A couple of minutes ago he had been in his room reading a magazine, listening for the telltale signs of his step sister Casey going into the bathroom for her nightly shower. With her ever busy schedule this is the only time she had found to take showers anymore. Luckily for Derek, that time was late enough at night that the only ones up were him, and Casey.

You see, about two weeks ago Derek was looking for his old hockey mask inside the hall closet, when someone entered the bathroom. Then, he stopped looking, and he listened, he realized that on the other side of the wall inside the closet was the bathroom. At first this realization seemed silly to him, of course he had known beforehand that the closet was right next to the bathroom. He guessed he just never thought about it that way. That was when an idea started to form in his head.

Even he couldn't deny how hot his step sister Casey was, and this plan may be the way to see just how hot she really is. So later that night he put his plan into action. He went into the bathroom and faced the wall that adjoined the closet. He took out his knife and poked a small hole in the sheetrock. Luckily their bathroom wallpaper was so busy that the only way for anyone to see it is if they were looking for it. Then leaving the light on he exited the bathroom, and entered the hall closet. His hole was clearly visible to him once he shut the door behind him and looked toward the wall. The light from the bathroom showed clearly through the hole. Not so much that it lit any portion of the closet, but enough to make it blatently obvious upon entering the room. Hmmm, he needed a way to fix that. He went back to the bathroom and got a little bit of toilet paper. He went back to his hole inside the closet and stuffed the little ball of toilet paper into it. Luckily it clung to the hole nicely making it basically invisible now, seeing as how the closet didn't have a light inside it. He also positioned a few hanging coats in front of it as well for safe measure. And lastly he placed a box on the floor in front of the hole and sat on it. He removed the toilet paper from the hole and peered through it. It was perfect. It showed the whole bathroom, nothing was out of his gaze. So for the past two weeks, whenever Casey took her nightly showers, Derek would acompany her on the other side of the wall, with her completely unaware of his presence. The sound of the running water and the music she played while she was in there really helped to conceal the sounds of his masterbating too.

So now, two weeks later, once again, with his heart racing with adrenaline he exited his bedroom and went into the hall closet, sat down on his box, removed the toilet paper and peered through the hole. He was just in time, she had just set her phone down from a text and was taking off her shirt. Then came her pants.

Derek marveled at her beautiful body. Her perky breasts stretching against her bra, her long smooth legs, and her tight ass. Derek felt himself getting hard underneath his shorts. Then she took off her bra, allowing her amazing tits to fall free at last, and Derek thought he was going to faint. And last but not least she pulled her panties all the way down and kicked them away with her foot. Unfortunately the wall that his hole was on was not the wall with the mirror on it, and she wasn't facing him directly, so he couldn't see her tight little slit yet. But he wasn't worried, he would see that when she exited from the shower. But right then his eyes were glued to that amazing ass of hers. He had always been an ass man, and he had seen more than he can count on the internet, but as far as he was concerned, Casey's was best of them all. He didn't know if it was the fact that she was his step sister, or if it was just because of the thrill of spying on her in the shower. It was probably a little of both.

At this point he couldn't help himself, and he spit on his hand for a little bit of lubrication, and he slipped his hand down his shorts and started to rub one out. Unfortunately right then, Casey turned her back on his hole and walked into the shower and slid the glass door shut. Sure he could still see her outline and basic shape, but it was never the same. So he waited patiently occasionally peeking through his hole to see what she was doing right then. Sometimes he would think he saw her masterbating as well, but her hand never stayed down there too long, and it was hard to tell through the glass.

Then finally after what seemed like hours, (it always does) he heard the water stop. This was always the best part, mainly because she took her time drying off and getting dressed, which allowed him more time to admire her. He saw the shower door open, and watched her exit the shower. Her long leg stretching to get over the ledge, giving him a nice unobstructed view of her wet little pussy. He started jacking off again. Her tits were dripping wet and glistening from the water clinging to her. She went over to the towel rack and grabbed a towel. Luckily for Derek she mainly just used it to dry her hair, as she wrapped it into a ball above her head. The rest of her body she let air dry, just standing there nude in the bathroom, while she sent out numerous text messages.

About a week ago he had learned the hard way to keep his phone in his room while he was in here watching her, when it started vibrating with a text from her. Luckily her music was a little louder than usual that night and she didn't hear it. But to Derek, it seemed as loud as an air horn when it broke the silence of his closet. It had almost given him a heart attack.

But now his hand was starting to move a bit faster, and his breaths were starting to get more labored as he felt himself nearing the edge. Casey was now gently swaying her hips to the rythm of the music she had playing tonight. It started out slow but as the beat of the song picked up, so did her swaying, and so did Derek's hand. He was transfixed on her breasts moving back and forth, and bouncing up and down as her movements became more spastic. He was close now just a little more... She continued to dance to the music and then she did something he had never seen her do before. She lowered her hand to her still wet pussy and started rubbing it. Not sticking any fingers in, but clearly and vigorously rubbing it, while still moving her hips to the beat of the song. The sudden sight of her rubbing herself sent him over the edge in a blinding orgasm that seemed to last for at least a full minute. So having acomplished his task, he quietly cleaned up and headed back to his room and plopped down on his bed with a contented sigh.

It wasn't long before he heard her exit the bathroom. But instead of heading straight to bed, he heard her knock at his door. "Hey, Derek, you awake? can I come in?" Derek felt his heart start racing a little with fear as he replied. "Um ya, sure, come on in." Then his breath caught in his throat as she entered his room, wearing what looked like nothing more than her bath robe. He adjusted his position on his bed so hide his member, should he accidentally start to get hard. She closed the door behind her, and turned to him. Then she said with a little smile on her face "So Derek, I want to talk about what you've been doing while I take my showers."

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Please Review, This is my first story, so it will really help. Thanks.