Tom tried to look away from the scene in front of him, but some unknown forces wouldn't let him. He tugged at his bonds hoping to find a way to free himself but was too well secured. He tried to protest at being tied up but due to the makeshift gag across his mouth, he was rendered silent. So he tried to keep his eyes shut and to mentally block out the moaning of pleasure that filled his ears, but he couldn't.
It had started out as a typical evening for him. His parents were heading out for a long overdue weekend to themselves and they went over the rules of no parties and no guests for the one-hundredth time before they left.
He and his sister Tammy nodded their understanding and bid their parents goodbye. Tom headed to his room looking forward to a night of surfing the web and visiting the hentai sites. Once behind the closed door he stripped off his clothing and dug out the pair of satin boxers that he kept hidden. It was what he wore when visiting these websites.
Tom loved the way they felt against his skin and they were loose enough so he wasn't uncomfortable when his teenage cock became hard at the sights and sounds he encountered. Many times he masturbated while still wearing them and lost his load inside them.
Tom at seventeen was tall with sandy brown hair and good looking enough to be a male model. He was also a little on the shy side and tongue-tied around the girls at school. That only made his female classmates want him even more as he didn't spend every minute in their presence trying to get laid.
His sister Tammy was sixteen and an absolute knockout. She was as tall as her brother and had the same sandy brown hair. Only hers, however, fell past her soft shoulders and framed a very pretty face. Unlike her brother, there was no shyness in her. Tammy was outgoing and very popular at school.
She often teased her brother with information concerning her friends' desire to have sex with him. It always caused him to blush and stutter that he wasn't interested, which was a lie. Tammy's friends were hot and he longed to hook up with many of them. He just didn't know what to say to them. Plus he was still a virgin so he really didn't know what to do.
So here he was sitting in his room behind the locked door watching the latest hentai video. His teenage cock grew hard as the characters started having sex and the sound of their moaning filled his ears. When he couldn't stand it any longer he removed his headphones and was about to take hold of his swollen manhood when he heard the muted moaning.
At first, he thought it was coming from the headphone speakers. Tom quickly realized it was coming from inside the house. So he left his room to investigate. As he passed his sister's room the noise became louder so he stood at her door and listened. Just as he thought, the sounds were coming from inside.
"Tammy has company," he said to himself.
He should have followed his instinct and returned to his room, but a wicked desire crossed his mind. Tom quietly turned the doorknob and peeked inside. What he saw caused his cock to begin to thicken again. For there on her bed and on her back was his sister Tammy. Her smooth, shapely, and tanned legs were across the back of Vince, the captain of the varsity football team.
Tammy was dressed in a short blue see-through nightie with eyes closed and her lips parted. Tom never saw her look so attractive. Each thrust of Vince's body caused another sexy moan to escape from between Tammy's red lips. So he watched with unblinking eyes and a hard cock. He tried to look away but couldn't. He reminded himself that this was his sister he was watching, hoping that would cause his feet to move. They remained planted on the carpeted floor.
When he finally found movement and just started to close the door Tammy opened her eyes and saw him.
"We're being spied on," she told Vince. "Grab him."
Vince was off the bed like a shot and pulled Tom inside the room. Tom tried to resist. but his slender arms were no match for Vince's muscled ones. Tom was pulled into the room and slammed into the wooden chair from her desk.
"What do we do with him?" Vince asked.
"Let's tie him up and make him watch," she told Vince.
So Vince held him in place as Tammy went to work with the roll of athletic tape she found in Vince's gear bag. Soon Tom's arms, legs and upper torso were secured to the chair. When Tom began to protest Tammy gagged him with a pair of her pantyhose. He was now secured and silenced.
"So, you like to watch your sister having sex?" she crooned in his ear.
Tom shook his head and tried to speak but nothing intelligible was heard through his gag. Tammy just laughed and returned to the bed where Vince was standing. She moved slowly allowing Tom to savour the sight of her firm tight ass moving under her silky nightgown.
Upon reaching the bed she wound her arms around Vince and placed her cherry red lips to his and Tom had to watch this musclebound jock kiss his sister deeply as he ran his hands all over her body. Almost against his will, Tom grew hard again as he watched this erotic show.
Tom had long been aware of how attractive his sister was. He had even gone so far as to spy on her as she stretched out in her bikini sunbathing in the backyard. He had once seen her scamper from the bathroom to her bedroom in nothing but her lingerie and was blown away by how hot she looked in her bra and panties.
And while Tom admired her firm trim body that's as far as it went. Tammy ended the kiss and then mounted her bed and got on her hands and knees. Vince tore a sealed condom from the strip on the nightstand and placed it on his rock hard cock before mounting the bed and positioning himself behind Tammy.
He pushed the hem of her nightie up thus exposing her firm tight ass into the air. Tammy then turned her head toward Tom and smiled. A second later Vince pushed his hard cock into Tammy's dripping pussy and once again the sounds of her moaning filled the air.
Tom lost track of time as he watched Vince ball his sister in different positions before winding up on her back. She would occasionally stare at him as Vince worked her pussy. Finally, Tom heard Vince announce that he was going to cum and he increased the speed of his thrusting. Tammy closed her eyes and held him tighter until a long sustained moan escaped her lips as Vince's body stiffened and shook.
In short order, Vince untangled himself from Tammy's arms and legs and redressed after removing his cum filled condom. Tammy donned her silky black robe before she escorted him from the room.