My keyholding step-sister

Getting caught!

Ethan was your average boy, having just turned 18, he was free from school and spending most of his time at home while everyone else went to work. Well, except his step-sister. They had known each other for about four years now, their parents married one year ago and that was about when they moved in together. Sara was her name, she stood at six feet tall, 5inches taller than Ethan, nice cream coloured hair, a set of boobs that would make any guy drool and her thighs thick and soft like marshmallows.

Her and Ethan never talked but, normally just complaining about who had the last bit of milk or even a few times when Ethan was younger when he got caught sneaking peaks at her, which landed him a few good groundings by his dad and step-mom.

Ethan was just sitting on the couch watching TV when his phone buzzed. Picking it up, it was his dad reminding him to double check he had everything packed for the vacation. It was too an amazing resort that had everything, a beautiful, warm beach, huge tourist attractions, plenty of marks and most importantly, according to Ethan's friend, the hottest girls ever. As Ethan thought about it all, the girls came into his head and he looked down to see his Binet poking up. He smiled a bit and slowly pulled it out of his shorts, starting to gently jerk himself off as he smiled and closed his eyes. Though he did t get far before he heard his sister exit her room, quickly putting his boner away.
"Oi idiot, I'm going for a shower, don't use any water!" Sara shouted out to him. Ethan ignored her, but right before he went to grab his waistband again, his step-sisters body came into his head, making him blush and think about her in the shower, warm water running down her body, the soap foaming around her tights and, oh god, those thighs. Ethan bit his lip, it had been a long time since he thought about peeking at her, but this was a new house and the window in the bathroom was always open and able to see through, giving him an idea.

Jumping up, he left the TV going as to not raise suspicion too much, slowly creeping his way to outside and over to the side of the house where the mirror was. He could already hear the shower running and Sara gently humming to herself as she washed her smooth body. Ethan gulped as he slowly lifted himself up on his tippy toes and looked into the bathroom. His pants instantly strained as he saw her move in the shower, her thick ass, round chest and even those goddess like thighs. Reaching down, he couldn't help but reach into his shorts and start to rub himself as he panted, his eyes locking onto her body as she showered.

Though, his fun didn't last long when he got distracted, slowly looking up, he was met with her eyes staring right into his as he went wide eyed.
"ETHAN!" Sara screamed as he quickly ducked down and sprinted to the door.
"YOU PERVERT!" He heard as he got to the back, swung the door open and ran inside. As he ran to his room, he past the bathroom and heard the shower stop with the showed door opening, he knew he was dead and would probably be forced to miss the vacation, meaning he have to stay at his grandparents house. As he got to his door, he jumped inside and closed it, quickly diving under his blanket, waiting for her to come in and start yelling at him.