Sebastian and Kathryn were just lying there silently. They had an intense evening of sex, but Sebastian was still furious at his sister. He stared at her angrily.

"What?", she asked as she noticed his stern look.

"This is not the way things are supposed to be between us, sis."

"What do you mean?"

"I mean the way you keep manipulating me. Coaching Cecile how to seduce me, everything that you planned with your cousin without sharing it with me. We're supposed to be honest with each other."

"These are just little games I play to spice up things between us, brother. C'mon these last few hours were like the best we had in quite some time, admit it!"

"OK, it's been awesome, but you should come to me first."

"OK brother, no more games. And now that we're being honest with each other, you should know there's a reason I wanted Cecile to seduce you."

"What is it?"

"Well she's changed. She's like a totally different person, she's…"

"Yeah, what's up with that? What has she been up to in England?"

"Well, there's a…, well, drug problem."

"Fuck sis!"

"It has nothing to do with me, I swear. I don't have a drug problem and I do cocaine alone. I will never ever take that risk."

"OK, I believe you, sis. So that's why she became so unhinged?"

"Probably. Several nights ago she…sort of, well, she seduced me."

"Wow, that's…wow!"

"Yeah, I had sex with her before, but I wasn't really that interested, but she was like, irresistible. And she talked about all the sex she was having in England and well, I just had to have her."

"Is that why you sent her to seduce me?"

"Not exactly. I was just thinking, now that Danielle has transferred to a new college, we need someone like her."

"You want Cecile to be our new Danielle?"

"Something like that."

"What about her drug problem?"

"Well that's a risk, but she's so hot, why not take that risk?"

"So how do you want to use her?"

"Well there were a couple of hot guys at the gala and some of them will be at that pool party next weekend. I thought I could use Cecile to check out who's susceptible to cheat on his girlfriend, Like Danielle did for me."

"Well there's something else you can try.

"What is it?"

"Have Cecile flirt with someone and ask him if he's into having a threesome. When he shows up, make an excuse for Cecile not being there and then, well you'll take it from there."

Kathryn smirked at him. "So simple yet so devious. You're a genius."

He just smiled back at her.

A couple of days later Kathryn informed Sebastian that Cecile agreed to go along with their plan and they went together to the pool party. Kathryn offered Sebastian to join them, but he declined. Cecile drew a lot of attention at the pool party. Many guys couldn't help staring at her as she walked around in her bikini. There were a few guys there Kathryn had her eyes on. One of them was Taylor Sawyer, whose family Kathryn knew well. He was an aspiring model and actor but his career was going nowhere. Kathryn was trying to get his attention at the gala, but his girlfriend didn't leave his sight. However he came to the pool party alone and it wasn't hard to Cecile to get his attention. They talked on the phone later that evening and Cecile told Kathryn he was into it. He would come by in a couple of days for a threesome. Kathryn would tell him Cecile was busy and take it from there.

The next night Kathryn and Sebastian went to a movie. Cecile didn't want to join them and stayed at the house. Kathryn wasn't that interested in the movie. She thought about Taylor and his body. His abs looked great at the pool party and she looked forward to fucking him.

Taylor was supposed to show up the next evening. Sebastian planned to go out for a drive and walked over to his sister's room to tell her he was leaving. Kathryn was there talking to Cecile. They chatted for a few minutes and then Sebastian said: "OK, I'm going out."

Kathryn then said: "OK, why don't you take Cecile along with you?"

It wasn't in his plans but he didn't mind. "OK, Cecile would you like to go out for a drive?"

Cecile looked at them and smirked. "Ah if you guys are expecting Taylor then he's not coming. He came over yesterday when you guys were at the movies and today ah, let's just say he needs his rest today."

"What?!", Kathryn asked incredulously.

"Yeah, I really wanted him to be all mine. I called him up yesterday when you guys were at the mobies, and when he showed up I told him it was all a ruse so I can be alone with him, and ah, he was really…", she giggled to herself, "turned on so I took it from there, It was awesome!"

"The plan was for me to be with him, Cecile!", Kathryn said furiously.

"Yeah but I really wanted him!"

"You are a guest in this house, Cecile, what the hell were you thinking?"

"I'm thinking it was Sebastian's idea, right?", she asked as she turned towards Sebastian.

Sebastian was dumbfounded. "Ah, what?"

"C'mon Sebastian, it was your plan right? You're always coming up with these ideas, especially for Kathryn." Sebastian swallowed hard, he was completely taken aback by Cecile.

"You're fucking, right?"

"Cecile, you are way out of line here!", Kathryn said.

"C'mon Kathryn, it's obvious. Hey, I slept with both of you, OK?"

"Cecile!", Kathryn exclaimed.

"You told Sebastian, right? The way you two talk about each other, how you respond when I just mention the other's name…"

"Cecile that is irrelevant now, OK? I'm talking about Taylor!"

"Relax, Kathryn", Cecile said as she slowly approached her.

"What the hell are you doing Cecile?" Cecile was just a couple of inches away from her.

"Shhh", she said softly as she placed her finger on Kathryn's lips.

"Cecile, what the fuck…", she stared helplessly at Sebastian, not sure what to do next.

"Shhh, relax Kathryn, OK? I know you and I know that when you're so upset, like you are now, you get so…horny", Cecile said and kissed Kathryn, gently pushing her tongue in between her lips. Kathryn was deeply aroused.

"Cecile", Kathryn helplessly tried to resist, but Cecile just placed her finger on her lips and said: "Shhh...let me take care of you now." Cecile kissed her again and this time Kathryn kissed her back. Sebastian looked at them mesmerized. He was very much aroused and was very hard. He couldn't think of anything hotter he has ever experienced. After a few moments Cecile started kissing Kathryn's neck and she slowly worked her way downwards. She gently unzipped Kathryn's skirt. She then grabbed Kathryn's underwear and then she suddenly ripped them. She then began to pleasure Kathryn with her tongue and lips. Kathryn was moaning heavily and in a way Sebastian never heard before. Cecile then grabbed Kathryn's leg and placed it over her shoulder. Kathryn was now leaning against the wall standing on one leg with the other resting on Cecile's shoulder. Sebastian felt he had to join them and he quickly undressed. He slowly approached his sister. Kathryn was so aroused she couldn't control herself. He looked down towards Cecile who was pushing her tongue in and out of his sister's body. It was an amazing sight.

"Say my name when you cum", Cecile suddenly said.

"Yeah say her name", Sebastian said.

"Cecile..Ce…Ce…", Kathryn uttered as she was panting. Sebastian was so aroused he was almost paralyzed. Drops of sweat were now dropping from Kathryn's body. Muscles in her legs were shivering and her face was twitching. Her eyes were shut as she bit hard on her lower lip. "Ce…cile", she screamed as an orgasmic sensation stormed her body. She almost lost her balance, but Cecile grabbed her waist and let her leg down gently.

She stood up and said to Sebastian: "You wanna fuck me so bad now, right?"

Sebastian couldn't restrain himself. He grabbed her aggressively and pushed her towards the bed. He struggled to take her cloths off and her t-shirt tore as he tried to take it off her body. It seemed to take forever but eventually she was naked and he was finally able to fuck her. An intense pleasure overpowered him as he thrusted his cock into her body. He let out a loud and uncontrollable moan.

"Say my name", Cecile said.

He felt he had to comply. "Cecile, Cecile, Cecile, Cecile, Cecile…", he went on and on.

"Yeah like that", Cecile said through her panting.

Kathryn was still reeling from her orgasm. She was trying to catch her breath as she looked on.

"Are you cumming?", Sebastian asked.

"Yeah in a minute", Cecile replied.

Sebastian was struggling to carry on. Kathryn was looking on. She knew her brother well and she realized that it was different this time. Her brother was totally consumed by lust and wasn't in control. Cecile was in control. When Cecile finally said she was cumming he allowed himself to climax. He felt relieved to release his load but when they stopped it was awkward. Kathryn was still leaning against the wall while he and Cecile were catching their breaths. They were silent and it seemed as if time stood still.

After a long silence Cecile finally said: "Fuck that was awesome."

"Yeah", Sebastian replied.

Kathryn was still silent. "You OK, sis?", Sebastian asked.

"Yeah", she said softly, almost whispering.

"God that was like a dream come true", Cecile said", "I mean each one of you alone is amazing and two of you together, that's like…fucking awesome!"

Kathryn and Sebastian were both silent, still trying to fathom what has just taken place.

"So how long have you two been fucking?", Cecile asked.

"High school, senior year", Kathryn replied.

"I see", Cecile said, "So around the time we first met when you manipulated me when I was dating court."

"Look Cecile", Sebastian said, "That was when we were younger and…"

"Oh that's OK, Sebastian. You used me, you manipulated me, that's fine. I learned a lot from you two. I wanna be like you. Get what I want, whenever I want it, always. Hey you two keep manipulating each other. Your sister told me to seduce you so you wouldn't be at that gala."

"You've changed, Cecile", Kathryn said.

"Yeah I'm more like you now. Like the whole story with Taylor, that's like a play out of your playbook, right? Lying and manipulating so I can fuck whoever I want."

"Was that your idea? Sebastian had nothing to do with it?", Kathryn asked.

"No", Sebastian quickly replied, "I had no idea, I swear, sis."

"You didn't miss much, Kathryn", Cecile said, "Taylor came like super fast and it was all awkward. His body is amazing, but he has no idea what to do with it."

"That's OK, Cecile, really", Kathryn said.

"I got like six phone numbers from guys at that pool party", Cecile said, "So Kathryn if you want…"

"Cecile, that's OK, really, don't worry about it. I believe you…kind of made it up to me just now", Kathryn said, "That was like one of the best orgasms I ever had."

"Thank", Cecile said, "Making you cum is like so awesome. Sebastian knows what I'm talking about."

"Sure do", Sebastian replied.

"Hey do you two think things will get weird now? Is it OK if I stay here until I fly back, I can find somewhere…"

"Oh that's OK", Kathryn replied, "I want you to stay."

"Good", Cecile said, "Cause I was hoping for more…more sex with you two or one of you or whatever."

"I would like that", Kathryn said, "Sebastian would as well, I'm sure."

"Ahh..yeah, sure", Sebastian said.

Cecile giggled. "I think Sebastian just got hard again", she said and they all giggled.

"I'm gonna go to the bathroom now and afterwards I wanna see you two fuck, OK? I mean you are sister and brother and it's like gonna be awesome to watch you."

"Hell yeah", Kathryn said. Sebastian was somewhat surprised by her quick response.

Cecile left the room.

"Sis, I swear I had no idea", Sebastian said.

"I believe you, brother."

"You are really OK with it?"

"I'm not sure, all I know that for the time being we should keep an eye on her and just do what she wants."

"Yeah, I guess", Sebastian said, "Wow she's so amazing, she's…wow, when she tore your underwear and went down on you, the hottest thing…wow!"

"Yeah she is awesome!. No one ever went down on me like she does. I think the cocaine has something to do with it."

"Fuck, sis", Sebastian said nervously.

"It's OK, we'll keep an eye on her until she returns to England."

Cecile walked back into the room. "OK, she said. I want you two to fuck, I don't care what position. Just say my name when you cum. Both of you."

Sebastian became instantly hard when she said that. Kathryn undressed and got in bed with them. She assumed the doggie style position Sebastian loves and when they were about to climax, they both moaned Cecile's name. Afterwards they had an orgy which lasted until sunrise. Kathryn remained awake after Cecile and Sebastian fell asleep. She had an awesome night with Cecile and her brother as orgasm after an orgasm rolled through her body. She was looking at Cecile who was sound asleep. Cecile surprised her. And she didn't like surprises.