After the day he had at UNC, John Chisholm was thankful to come home to an empty house. John was the only male in a family of 5, one mother and 3 step-sisters, his step-father having passed away 2 years prior. As John looked around he found that none of his stepsisters, nor his mother, was anywhere in sight. A note left on the kitchen counter informed him that his mother would be back from a business trip on Monday, his sister Jessica (21) was visiting a girlfriend in Charlotte, his sister Emily (20) was working and would be home around 10:00 pm, and his little sister Amy (18) was staying the night at her friend Alyssa's house and would be back on Saturday morning.
All John could think was he was free of step-sister's interference by his for at least another 5 hours. Plenty of time for some rest, relaxation, and surfing the net for porn sites. At the ripe age of 19, John had a libido that had to be satisfied. Unfortunately, all his time was spent either working or doing schoolwork. His number one priority was getting his education out of the way; afterwards he would have plenty of time for some girlfriends. Until that day, he would just have to do with some porn sites and his trusty right hand.
Unfortunately for John, the only computer in the house was in the communal office, which was shared by all the Chisholm siblings. So that meant that he was only able to surf the net for porn on rare occasions, which meant the majority of his masturbation was to fantasies in his own mind. However, today had proven to be an exception to the norm and he was able to do what he wanted to, at least for the next 4 to 5 hours.
John grabbed a soda and a quick sandwich then made his way into the office. As the computer was starting up, he quickly changed his clothes into some flannel night pants and a t-shirt. Deciding to forgo the wearing of underwear for easier access to his member. Then he returned to the office for his eagerly anticipated extracurricular activities.
He quickly found one of his favorite sites, which contained nothing but pictures submitted by real women. He liked seeing the imperfections on the women and not just airbrushed photos by a professional photographer. As he scrolled down the list of recent submissions he found one that caught his eye, "Hot 20yr old UNC Student". His curiosity was piqued, wondering if he would recognize the girl that submitted the photos. Perhaps he even shared a class or two with her, excited he clicked the hyperlink to the photo set.
John waited patiently as the photos began to appear on the computer screen. He was disappointed to find that the face had been blurred in the picture, so he couldn't know for certain exactly who she was. The pictures were excellent though, a brunette with hair down to her shoulders that had perfectly shaped tits and a nicely trimmed pussy. He felt himself beginning to stiffen in his flannel pants and undoing a button he let his shaft poke through, his cock growing stiffer with every picture that popped up.
Not wanting to cum too quick, he began to slowly massage his raging hard-on, stroking his shaft from the base to the head in slow easy motions. As he stroked his shaft he imagined letting his cock slide in and out of this beauty on the computer screen. Her puffy pussy lips surrounding his shaft as he slowly sank his entire length into her wet opening. As his imagination began to flourish he began stroking faster, mimicking the thrusts in his mind. John could feel his shaft growing larger under his ministrations, ready to explode at any minute. He grabbed a tissue paper, and positioned his hand to catch his impending explosion.
John was so intent on getting off to the vision on the screen; he did not hear his sister Amy and her friend enter the room. Just as he heard the "Ahem..." coming from Amy's mouth he began to explode. Jets of cum streaming from his shaft into the waiting tissue paper.
"Oh my God!" Alyssa shouted.
John turned crimson red, embarrassed at being "caught red handed". He shoved his quickly deflating cock back into his pants and turned to his little sister. "Just what in the hell are you doing here!?" he demanded.
"This is my house too!" Amy retorted. "Besides, does mom know about this?"
"Why in the hell would she know about it? It's not like I whip it out and do it with her in the room. What business is it of yours anyway?"
"It's not... what were you jacking-off to anyway?"
"It's none of your business..."
"It is my business, unless you want mom to find out about you beating your meat in the family office."
"Fine..." said John resignedly, "it's this website where real women can post their pictures."
"Can I see?" piped in Alyssa, straining to look at the computer screen.
"Sure... why not..." John replied.
Both girls moved up to the screen and immediately read the headline. "Oh my God, John! Do you know this girl?" asked Alyssa.
"I don't know, as you can see her face is blurred out. I was actually kind of disappointed about that..."
"Not disappointed enough to whip it out though, huh?"
"I guess not... but that's my business."
The girls continued to scroll down the pictures, peering intently at the photos as they appeared. Amy suddenly had a look of recognition on her face and quickly scrolled back through the pictures. "John... you do know who this is!"
"Ok then enlighten me...who is it?"
"Think about it John..." Amy said, "who do we both know that has long brunette hair? Who do we know that has such nice shapely legs and a bubble butt?"
John began to slowly realize exactly who Amy was referring to. "No way...that's not possible!"
"Who is it?" Alyssa asked.
"It's Emily! John was beating his meat to a picture of Em! Boy is she going to flip a lid when she hears about this!" Amy began to laugh.
"No! Em is not going to find out about this. I mean after all... are you certain it is really her?" Alyssa asked Amy.
"Why what do you have in mind?" Amy asked puzzled.
"Yeah?" retorted John. "Don't I have a say in this?"
"No, John, actually you don't. You see Amy and I caught you in the act. So... unless you want us to tell your mom and Em, you have to do as we say."
"Oooh, I'm liking that idea Alyssa." Cooed Amy. "Our own slave boy that has to do as we ask!"
"Slave boy my ass!" John shouted. "I'll have no part of it."
"Yes you will, John..." Alyssa said. "I mean, you may even learn to enjoy it."
"How long?" John asked resignedly.
"What's that?" Amy asked.
"How long am I expected to be your 'slave boy'?" John asked red faced.
"Until we think you have paid off your debt to us." Alyssa responded.
"John, Alyssa and I are going back to my room to talk about our plans for you. Don't go too far! Oh... and I'd be more careful the next time you decided to whip your thing out." Amy smiled wickedly and left the room arm-in-arm with Alyssa.
John slumped back into his chair, uncertain how he had managed to get himself into the position he found himself in. At the same time he was intrigued by what may be in store for him. Twirling around, he looked at the pictures on the screen again. He could feel his cock beginning to harden at the thought of finding pictures of Em naked, and at what may be in store for him at the hands of Amy and Alyssa.
John didn't quite know what to expect from Amy and Alyssa. All he knew was that he didn't like the idea of being anyone's "slave boy". But, it was his own fault for getting caught with his dick in his hand. How was John supposed to know that at the moment of ejaculation, Amy and Alyssa would walk in? Let alone find out that the girl he was masturbating to was his older sister Emily.
John's mind reeled with the problems that he had brought on himself. All he wanted to do was get through college successfully. He had even decided to forgo building any kind of relationships, since his number one priority was making it through his tough course load. Now, the only release he ever offered himself had been ruined and he was stuck being a "slave boy" to his younger sister and her friend Alyssa.
He gave an angry look at the computer, the picture of Emily on all fours still very visible on the screen. With a sigh, he closed the window. No use beating himself up for what happened, he thought, since he can't change anything now. With a heavy sigh he turned over the first page of his Biology 101 book; guess it was time for him to get back to business.
The girls made their way back to Amy's bedroom. Amy couldn't help but notice Alyssa's smug look that had taken root her face. She knew that Alyssa had been crushing on John for quite some time, and wondered what could be going through her friends devious mind. Amy also knew that while Alyssa was obviously interested in John, he was more interested in getting through school and paid Alyssa no mind at all.