Spying a Peeping Tom

As the hot water poured over Mark his mind wandered. He still didn't understand why Ashley had offered to take him to school. It had been years since she had done anything nice for him and for her to suddenly change was shocking to say the least. Next he thought about his sister masturbating to the thought of him. He still couldn't believe that his mental conditioning of her had gone so far as for her to fantasize about him even when he wasn't trying to mess with her.

It was then that out of the corner of his eye he caught the faintest amount of movement. The door had cracked slightly. Making sure to not look directly at it as he washed himself, Mark looked closer. He then saw an eye looking through the crack in the door. A pale blue eye. His sister's eye! His sister was spying on him again. After thinking about it for a second Mark decided to give her a show if she was going to be peeping tom. Grasping his cock in his hand he slowly started stroking. He saw the eye in the crack grow wider as she saw what he was doing. As he got harder, Mark picked up the pace of his jerking. Not saying anything, he just grunted and moaned as he went faster and faster. Leaning against the back wall of the shower he stroked as fast as he could. Feeling the familiar sensation in his balls he said loud enough for Ashley to hear, "Yeah! Take it you dirty whore." His jizz then exploded out over the glass door. His cock deflating he quickly glanced back at the door and saw that it was completely shut. Smiling to himself he hoped his sister enjoyed his little performance.

After finishing up the shower, he dried off and went to his room. Mark got dressed and then made his way back downstairs. In the kitchen he saw his sister standing over the island counter with her back to him. She was wearing a very loose pink shirt that showed off her midriff. This would certainly have been appropriate during the summer but now during the winter it made no sense. She was also wearing a pair of black leggings. Hearing him approaching she turned around and smiled. Mark's eyes immediately went to her crotch where he noticed the leggings were pulled between her pussy lips giving her a pronounced camel toe. Seeing this gave Mark a hunch. Stopping time he walked over to her and pulled open the front of her pants. Proving his hunch correct he saw that she wasn't wearing any panties at all. Closing her leggings again he walked back to where he was standing and started time.

Still smiling at him she asked, "You ready to go?"

"Sure", Mark replied.

They walked to the front door where they put on their winter jackets. Then, with her back to Mark, Ashley bent over at the waist to put on her shoes. Her legs slightly apart, Mark could see the camel toe from the back and the curvaceous form of her ass. And then like a ton of bricks, Mark realized what she was doing. Being nice to him, offering him a ride to school, wearing clothes that didn't make sense for the season, and giving herself a camel toe, and then thrusting her ass in his face...She was trying to seduce her brother! "What a dirty little slut," Mark thought to himself smirking. "Oh she can try and seduce me all she wants, doesn't mean I won't make it easy for her" he thought wickedly as she straightened out and stood back up. Mark was going to fuck his sister eventually, he had no doubts about that, but he wanted to make her work for it. Getting in the car, they started to drive to Mark's high school.