Tom could only stare at his sister as she entered his room. Tammy had clad herself in a makeshift costume that resembled one of the girls in his beloved hentai videos. A short pleated skirt, white stockings and a crisp white blouse under a blue blazer. The blouse was unbuttoned just enough to display her tiny white bra to be visible. 

Wasn't she the same girl that he had caught balling her boyfriend not a few hours ago? She looked up from being boned and saw him looking through the partially open door and then ordered Vince, her lover, to grab her brother and bring him into the room. Tom was pulled into the room and slammed into a chair.

Once seated he was bound with athletic tape by Tammy and then gagged. Tom was then forced to watch this musclebound jock stick his large cock into his attractive sister in every imaginable position. He tried to close his eyes and block the sounds of her moaning but was unable to and his own cock grew hard in record time.

Eventually, they finished and Tammy escorted Vince out of the room and promised to release him when she returned. When she did return she walked right by him and headed to her bathroom. She returned shortly still clad in her short silky bathrobe and stood in front of him where she untied her robe. It slid to the ground to reveal a stunning lingerie set underneath.

Tom grew hard as Tammy removed her bra and sat on his thighs as she pushed her full lush breasts toward his mouth. She removed his gag and asked him to kiss her tits. He complied so she would release him, but she didn't. Tammy them begged him to suck on her nipples and once again he complied as his inner-voice reminded that this was his sister. Then she kissed him. It was the deepest tongue kiss he had ever received.

She then released his hard cock from its satiny prison and placed a condom on it. When Tom began to protest she gagged him again before straddling him and placing his hard cock at the entrance to her wet pussy. Tammy then slowly lowered herself on his stiff manhood and commenced to ride him. It was only after he emptied his load into the condom that she released him and he bid a hasty departure.

One thousand conflicting emotions ran through his brain as he showered. He had kissed and sucked on his sister's nipples and she had given him one of the greatest French kisses he had ever gotten. This can't be right. He recalled Tammy mounting his hard cock and taking his cherry as he was bound and gagged. 

One of the emotions that he was dealing with was that it all felt good. This despite his inner-voice calling him a freak and a pervert for enjoying it.

He returned to his room and soon lost himself in the videos of his favourite hentai sites. It was sometime later that Tammy knocked on his door requesting to speak to him. That's when he opened the door and found her clad in her costume.

Tammy crossed the room and placed her books on his low dresser. As she bent down Tom was able to see the tiny white silk panties she wore under her short skirt before she turned around to face him.

"I am thankful you were able to clear your schedule," she said in a soft musical voice and a slight bow.

Tom was unable to move or speak and he just stared at the vision before him. She didn't look or even sound like his sister and his body reacted to the sight of her costume and the scent of her perfume. There was some small talk from her about her lessons when she suddenly stopped talking and grew silent.

"Oh my," she said with wide eyes and a pointed finger. "Perhaps I better leave".

Tom looked down and saw his erection pushing against the front of his boxers.

"Please don't leave. I shall don my robe," Tom responded.

"No. I better go as you are much too excited," she continued.

A second later Tom crossed the room and took his costumed sister in his arms and pulled her in close to his body and placed his lips on hers. There was resistance on her part as he tried to push his tongue into her mouth.

"Teacher, please. I am only sixteen and have a boyfriend," she managed to say as she pulled her face away from his.

"I won't tell if you won't," Tom responded and pressed her against the low dresser.

Behind her back, he found her books that she had bound with a belt and managed to undo it. Still pressed against her he slipped her wrists into the loop of the belt and drew it tight. He then pushed her toward his bed and placed her on her back. The long end of the belt was then wrapped around the bedpost and she could no longer bring her arms down.

Tom laid down next to her and ran his hand up her silk covered legs and to the crotch of her panties that had become very wet. He then straddled her and began to unbutton her blouse. Once the opening parted he then reached in and cupped both of her breasts and began to massage them through her silky bra

"Oh Mariko, your breasts are perfect, " she said to his sister.

"Teacher, you must stop or I shall tell the school administrators that you have had sex with some of the other students," she whimpered.

"So, you've been spying on me. For that you shall be punished," Tom said as he took a position at her side and reached under her skirt and drew her panties down.

The pretty schoolgirl began to thrash around attempting to stop him and that only made him hotter to be inside her. Once her very wet silk undies were removed he quickly mounted her again. This time he directed his hard shaft toward her pink slit and he pushed himself inside. She issued a long moan as she felt his cock slide inside her.

"Teacher, please stop. You have no protection," she begged.

Her protests were ignored as Tom began to slowly hump her. In Tom's mind, this was not his sister. This was one of the pretty girls from his beloved hentai videos. Between being bound and taken by her brother it didn't take long before she felt her orgasm approaching.

"Teacher, I'm going to finish," she whimpered.

This caused Tom to increase the speed of his ride. A second later he felt the heat of his sister's pussy increase as her internal muscles gripped his cock and a long sustained moan filled his ears as he felt her body shake. Shortly afterwards, Tom felt his own orgasm approaching and he quickly withdrew and grabbed his wet slick cock.

"Look at me, Mariko," he said as he commenced to jack his cock.

The pretty schoolgirl opened her eyes just in time to see him lose his load between her breasts. The sight of his hard cock spewing its contents and the feeling of the warm liquid on her skin pushed her over the edge again. Tom got of Tammy and undid her secure hands and they held each other as their breathing returned to normal.

"I'm going to get cleaned up and I suggested you do the same. I'll be back in an hour or so," Tammy said as she slid off the bed and recovered her panties, books and belt.

"You're coming back?" Tom questioned.

"Yes. We are going to watch some of those videos that you love. I need some ideas for our next punishment session," she informed him.

"You liked it?" he asked.

"More than you know," Tammy said as she exited the room.

"This might be the start of one of the best Summers of my life," Tom said to himself as he headed to the master bath.