Ben sat in silence among the rowdy classroom. Under his calm demeanor, he was panicking.

"Fuck, this was the second time I've forgotten my assignment," he worried to himself.

His English teacher, Mrs Clark was strict on tardiness, and he was already warned the previous lesson. The next time meant detention.

Ben found her rather attractive for a forty-something woman. She was five foot four with a mousy blonde "Karen" hairstyle. He loved the way she dressed as well. Every lesson he prayed she wore her black sleeveless turtleneck. He never told anyone about his "turtleneck" fetish but whenever he saw a woman wear one he would get an instant boner.

She confidentially walked through the door and the class fell silent. Ben got his wish. She was wearing his favorite top, black jeans and a cute metal watch to accompany her outfit. He got a glimpse of her wedding ring as well. Right now he envied the guy who got to marry her!

"Good afternoon, class. I hope there are finished assignments for me," she said in a patronizing 'sing-songy' voice.

Ben snapped back into reality and realized how in deep shit he was.

She called the students who had outstanding assignments to her desk. One by one they handed them in. Finally, it was Ben's turn.

"I... I don't have it with me. The printer didn't work," he told her, trying to give a reasonable cover-up.

"Well, I'm afraid that's a detention," Mrs Clark casually said. "You can either have it today and get it out of the way or you're in tomorrow."

Tomorrow was Saturday, he thought. No way was he spending it at school.

"Today," he replied.

She nodded and pointed to his desk. He slumped down and sighed.

"At least I get an extra hour of admiring her in a turtleneck," he thought to himself.

When the bell rang, Mrs Clark asked Ben to sit at the front where she could keep a close eye on him. For detention work, she let him work on other subject assignments so he wouldn't "fall behind" on them either.

She leaned back on her chair and relaxed, placing her hands behind her head and giving Ben a full view of her smooth, lickable armpits! He couldn't help but think that she was doing it on purpose. Did she know of his secret fetish?

The time arrived when the detention was over. Ben was about to leave until Mrs Clark interrupted him.

"Are you walking home, Ben?" she asked.

"Uh, yeah," he replied.

"I can give you a lift home if you like?" she asked.

Ben was about to say no, but he once again glanced at her sleeveless arms, and weakly nodded.

"The more time with Mrs Clark, the better," he thought.

The two made their way to her car, and Ben got into the passenger seat. He gave her directions on where he lived, hiding his boner under his rucksack.

They reached the traffic lights, turning left would take them on a straight road to Ben's house. Instead, Mrs Clark turned right.

"Uh, Mrs Clark?" Ben said. "We're going the wrong way."

"I just need to go to the gym for a few minutes. You don't mind, do you?" she asked.

"That's fine, I guess," Ben said, a little sheepishly.

They parked the car. Mrs Clark looked at her watch.

"He'll be out soon," she said.

Ben was ordered to sit in the back, and instantly thought of her husband.

A tall, brutish man strutted towards the car. This guy was her husband?

Wait, Ben recognized him. It was Mr Michaels, his ex gym teacher! Definitely not her husband. He looked and dressed like Stone Cold Steve Austin, chain necklace and everything, except with short dark hair.

And Ben despised him.

Mr Michaels was your typical gym teacher who favored the jocks and belittled the "less sporty" students, Ben included. In fact, Mr Michaels was straight-up fired for being a bully.

He swung open the door and sat in.

"Hey it's Ben, right?" he asked. "What's the kid doing here?" he asked Mrs Clark.

"Kid? I'm eighteen!" Ben thought.

"Oh, he's just had a detention with me and I'm taking him home," she replied.

"And Ben, you remember Trent, uh, Mr Michaels. He's my... friend," she continued.

Finally, they arrived at Ben's house.

"Thanks for the lift, Mrs Clark," Ben said, unbuckling his seat belt.

He noticed that Mrs Clark and Mr Michaels were doing the same thing. They got out of the car with him.

"So, are your parents home? Brothers and sisters?" Mrs Clark asked.

"No, I'm an only child. And on Fridays, my parents won't be back until 10 PM," Ben replied.

"Well, aren't you going to invite us in?" Mrs Clark asked. "It's the least you could do after being given a ride home."

Confused, Ben let them in. Sleeveless fetish or not, he didn't particularly like the idea of teachers in his home, let alone Mrs Clark and a man he hated.

Ben sat on the sofa, while Mrs Clark and Mr Michaels whispered something in the hallway. After about a minute or so, they entered the living room and sat beside Ben.

"Listen, Ben," Mrs Clark said. "As you've probably noticed, Mr Michaels, Trent, isn't my husband... But that doesn't mean we aren't... You know."

Ben was silent, but he knew what was up. Mr Michaels was Mrs Clark's lover. He felt an erection again.

Mrs Clark continued, "Now, Trent and I rarely get time to spend time together... And we would like to spend our Friday evenings here, away from my husband. Plus, motels aren't cheap!"

Ben was shocked and about to say, "No."

"Also, for your hospitality, I will give you straight A's for the rest of the year and give you a lift home every Friday. You can forget about that assignment. How's that?"

Ben thought about it. The deal sounds good in theory, but it's morally wrong and weird as fuck... Still,

"OK," Ben said. "What happens now?"

Mrs Clark placed her arm around him. Her armpit close to his neck and the coldness of her watch on his skin made his cock feel like it was about to explode.

"Well... Trent and I are going to... You know," she said with a sly smile.

Mr Michaels gave a hearty laugh and patted Ben's back.

"So, would you direct us to your parent's room?" Mrs Clark asked.

"Upstairs, last door on the left," Ben said.

Mrs Clark and Mr Michaels stood up and held each other's hands, walking out of the room. Ben heard them rush upstairs, giggling, finally with the bedroom door closing.

Ben sat in silence for a while, wondering what to do. There was a couple having sex in his parent's room at this very moment. He wanted to stand outside the room and masturbate. On the other hand, he wondered what they would think if they found out what he was doing.

The thrill overpowered him and he crept upstairs.

He noticed that the bedroom door wasn't closed properly, so he could potentially open the door slightly and watch them in full! He crept across the landing to the door.

Ben heard Mrs Clark giggling, as well as a faint sound of R&B music. They were playing one of Mom's CDs. He slowly opened the door. All Ben needed was the door an inch or so open for him to see the whole bed.

There, Mrs Clark was on her back with her arms raised. Mr Michaels was shirtless, licking her armpits! Ben instantly felt jealous. On top of that, she was still wearing her sleeveless turtleneck. He licked her arm right up to her watch, and then back to her pit.

Mr Michaels pulled off her jeans and panties, revealing a trimmed but still hairy vagina. Ben's eyes widened. She pulled down Mr Michaels' pants in return, showing off a large, veiny penis. Ben looked at his own. His was rather short in comparison. The couple got onto their knees and passionately kissed, while Mr Michaels groped her boob. Mrs Clark pulled off her turtleneck, and then unhooked her bra.

Ben gawped. He had never seen another woman in the nude before. Not in person at least. And it was happening in his own home!

She pushed Mr Michaels down and climbed on top of him. This was it. He was going to witness actual sex!

Just as the tip of his penis touched Mrs Clark's vagina, she turned her head to the door, right at Ben.

"Come here, Ben," she said sternly while beckoning with her index finger.

Ben nervously opened the door.

"Sit, you disgusting young man," she said while pointing at the chair beside the bed.

Ben shakily sat down, eyes still wide open.

"Well now that you're here, you may as well get a little "sex education". What do you think, Trent?" Mrs Clark asked.

Mr Michaels let out another hearty laugh.

"Yeah let's show the little nerd what actual sex looks like," he said.

Mrs Clark smiled and guided his penis into her vagina. She started off slow, picking up the pace to having hard sex in the cowgirl position.

Ben was simply shell-shocked, watching his teachers fuck wildly on his parent's bed.

Mr Michaels flipped Mrs Clark onto her back and pounded her vagina. Ben could see the sweat drip down Mr Michaels' muscular torso.

They switched positions to kneeling upright, Mr Michaels fucking her from behind. She lifted her arm around his neck for him to lick.

Ben rolled his eyes and let out a moan. Finally, he grabbed his penis and masturbated in his pants. Mrs Clark smiled.

"I knew you had a thing for my arms," she sneered. "But only Trent gets to touch them."

Ben felt his face burn in embarrassment. All this time he thought no one but himself knew.

Mrs Clark got into a sitting position, outstretching her arms on the headboard while Mr Michaels fucked her. After several more strokes, he ejaculated into her vagina. Ben had also ejaculated.

The couple collapsed into each other's arms and cuddled. Ben still sat there, dazed by what had happened.

Mrs Clark looked over at Ben.

"Now, could you go downstairs?" she asked. "That's enough 'education' for today."

They giggled as Ben shakily got up and walked out.

He walked into the living room and sat down, trying to process everything. After a few minutes or so of silence, he heard the couple fucking again. The crashing headboard echoed throughout the house.

It got dark rather quickly. Either that or Ben had been stunned for several hours. The couple came downstairs and lounged as though this was their own house.

"Oh, you better wash the sheets, Ben," Mrs Clark said with a smirk.

Ben couldn't even get a single word out. Mr Michaels sat beside him and ruffled his hair to the point it hurt. They turned the television on. Ben got up and sat in the chair while Mrs Clark and Mr Michaels cuddled on the sofa.

After a while, Mrs Clark looked at her watch.

"Goodness, it's gone 9:00 PM!" she exclaimed. "My husband will be wondering where I am!"

Ben realized they had spent over five hours in his home.

Mrs Clark and Mr Michaels got ready to leave, but not before she had something to say to Ben.

"Thank you for this, Ben. A deal's a deal. Trent and I will come over every Friday and you don't need to finish your assignment."

"O... OK," Ben replied.

"Also perhaps in time, I may even let you play with my arms," Mrs Clark said with a wink.

Ben watched as Mrs Clark and Mr Michaels drove away. He looked at his cum-stained pants and realized this would be a regular thing for the foreseeable future.

He couldn't help but smile.