I had planned on splitting this into multiple chapters, but there wasn't really a good spot to break it, and as it all happens in one night, let's keep it all together!
Enjoy!
-----
The class had come to order, now on the third day of the 1-on-2's. Tuesday's class had a full period of sessions, with four students each having two Subjects. It was very interesting to see the dynamics of which two Subjects were matched with each student, creating a number of unique throuples. By end of day, the students had a much better understanding of what they were in for.
Wednesday's class was the third day of the 1-on-2's, and the Subjects were loving it more and more. As much as they enjoyed being with the students, having a student AND another Subject was very exciting to the four ladies.
"Okay, class...the first two groups for today are Clay Morrison with Katy and Kaia, and Steve Milton with Marcia and Lily! You all know the drill."
Lily's eyes went wide. "Oh, no! Oh!" She scooted off the dais and half-ran to the teacher. "Mr. Bentley! I'm so sorry...I forgot to tell you!" Katy and Kaia both looked at each other, a little concerned by Lily's actions. Then they looked at Marcia who immediately knew what was happening. The sister stepped off the dais and moved slowly forward. A moment later, she was joined by Dara who shared her concern.
"What is it, Lily?"
A slight blush across the bridge of her nose, Lily's voice dropped to a more private tone. "Umm...Steve and I...are...dating. I'm sorry! I should have told you!" Mr. Bentley looked up and saw both Marcia and Dara get as close as they could without interfering with teacher and Subject. Both looked very worried. The instructor looked back down and suddenly it looked like Lily was going to cry.
"Hey! Hey! No, Lily! Come here!" He brought the girl off to the side and knelt down next to her. "What's wrong?"
Tears were forming in Lily's eyes. "I...I should...have told...told you. Now I've ruined the session!"
"What?! Lily! You haven't ruined anything! Listen to me."
Lily regarded Mr. Bentley, her eyes big. It stabbed at the instructor's heart to see her so affected.
"Lily. First of all, I love that you're dating Steve. You two are a good match."
The Subject blinked. "But...but the session..."
Mr. Bentley shook his head slowly and he rested his hand gently on Lily's shoulder. "The session is fine. In fact, I'm looking forward to it even more now! Before, the dynamic was you and your sister and how Steve would adapt. Now it's Steve adapting to the two sisters AND Marcia adapting to you and Steve AND you wanting to please both of them! I think it's fantastic!"
"You...do?" Her face morphed almost immediately to a huge smile. She hugged the teacher fiercely. "Thank you, sir! Thank you!"
Both Dara and Marcia visibly relaxed when they saw the hug. Dara then noticed for the first time that Steve was standing there, that same look of worry across his face. He saw her looking at him and dropped his eyes in subservience.
"Hey, Steve."
The boy looked up and blinked when he saw Dara smiling at him.
"Have a good session. Show my sisters a good time." She fist-bumped him and walked back to her seat.
A slight smile crossed Steve's face, which got bigger when he realized that Dara called him 'Steve' for the first time. Then Marcia was there.
"Try not to leave me out." She then turned and walked back to the platform, disrobing as she went. The boy swallowed as his heart beat faster.
-----
The two threesomes twisted, pushed, and pulled, moaning and groaning in erotic bliss while the rest of the class looked on. On one side, Clay drove his cock deep into Kaia while the African girl feasted on Katy's pussy. Clay really enjoyed his encounters with Kaia...he never felt like he had to hold back physically with her. The other three girls, especially Lily, seemed much more fragile and he had to watch himself to make sure he wasn't too rough with them. The rational side of his brain told him that Katy, Marcia, and Lily were all strong in their own way and didn't need to be protected, but Clay just couldn't bring himself to go all out on them.
But with Kaia? She welcomed his power. He pounded her cunt with deep, hard strokes that made her grunt in effort as she fucked him back. This grunting was directed directly into Katy's sweet little twat which was up against her face. Katy watched the boy fuck her girlfriend and it thrilled her with every strong pump.
On the other side of the dais, Steve was on his back, his cock deep in Marcia's pussy, the blonde straddling him, the two kissing deeply. At the same time, Lily, armed with a strap-on, was sliding it in and out of her big sister's ass.
Lily was not overly accomplished with strap-on toys, but had been given pointers (as well as the toy itself) from her other sister Dara and it had only taken a few deep strokes for the girl to get into a groove with the plastic cock.
She was so happy that Steve suggested DP'ing Marcia like this. She was so afraid that her budding relationship with Steve would somehow foul the session, but Mr. Bentley did such a good job making her feel better, and both Marcia and Steve made her feel even better than that.
Now she was butt-fucking her sister, and she was on top of the world.
She leaned forward, laying her slight weight onto Marcia's back. Her skin felt so lovely against Marcia's own and she lightly squirmed as she felt her sister's warmth.
Lily then kissed Marcia's neck as she pumped her hips, driving the thick toy into the other girl's butt. She knew how much Marcia enjoyed anal sex and wanted so much to make her big sister happy. Lily gripped Marcia's shoulder, giving her extra leverage to power the dildo as deep as she could. With each stroke, she heard a wonderful sound come from Marcia and it energized her, driving her to keep pumping.
Then her face was next to Marcia's and so was Steve's. The blonde had full lay down on the boy, turning her head to one side. Lily and Steve made eye contact and he smiled at her even as he thrust upward into Marcia.
Lily blushed deeply, even as she thrust downward into Marcia.
Then they were kissing, and Marcia could tell and was so incredibly happy. She knew how much Lily thought about Steve, how much she was into him. For her to be the vessel that allowed them this moment, Marcia was absolutely loving it.
Lily happily hummed into the kiss, her hands now probing her big sister all over until they met Steve's and now they were clasping with both sets of hands even as they continued to kiss.
And throughout all of this, the double penetration continued and Marcia's body shook as she came again.
-----
Bess was seated at her desk chair in the midst of applying makeup when her mother knocked.
"Come in!"
Janet entered the bedroom and smiled at her daughter.
"Ooh, that's a nice color!" The mom moved up next to Bess and looked at their reflection in the mirror. "Tim will like it."
Bess nodded, and then looked at her mom's reflection. Janet frowned, seeing a pensive expression on her daughter's face. "Baby, what's wrong?"
Bess turned in her chair. "Mom, I want to tell you about tonight, but it means telling you about something else."
Janet blinked, then sat on Bess's bed. "Okay..."
Bess got up and sat next to her mom. "So, remember when Katy came over that first night?"
Janet's smile was a mile wide, her mind taking her back to that wonderful evening with her husband and Katy Jenkins. "How can I forget?"
Bess smiled back, nodding. "Remember how she told you guys that I went out that night with a boy?"
"Yes, I remember." Janet had always been intensely curious about whomever this boy was that Bess had dated and presumably had sex with, but she respected Bess's privacy too much to pry.
"I...want to...tell you who he was. It's not right that I never told you."
Clearly this wasn't just some boy. Janet shifted closer and put her hand on Bess's. "Baby, you don't have to tell me. Honestly, I'd love to know, but it's up to you."
A deep exhale. "It...it was Mr. Bentley."
