This is the second part of the story 'Eleni β The Beginning'. Many thanks to 'allaboutne' for great editing.
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Her ankles were on his shoulders and his cock was buried deep in her pussy. Kostas was slowly pumping in and out of her frame, I was watching them with my dick in my hand. They like me watching them... They want me to watch them... My once sweet innocent sister was now a sex goddess for me and I desired her deeply. Yet, the only thing that I could do was just watch... Before when I watched them I was able to touch one of those beautiful globes, grip onto them and feel the swell of her extremely developed breasts. I wondered idly if now would be like those times, would I be able to touch her again. Before I could finish the thought Kostas spoke in a whispering tone.
"Why don't you come closer, pal?"
I didn't need more encouragement. I approached them, placed myself on my knees next to the couch. My dick was still in my hand. I explored her lovely tits with my eyes, watching as they were swaying with each of his thrust. I could smell her magnificent odor.
"I want him to touch you, baby. Let him feel you a little bit, ok?" Kostas whispers to my beautiful sister.
Eleni nodded. Leaning forward, I played my fingers over her swelling breasts. I traced around her lovely globes until I reached her throbbing nipples, and she moaned. Playing with her nipples, I softly pinched and stroked up and down with my fingertips.
"Go on," Kostas encouraged. "Taste them."
That was new. I always enjoyed watching and caressing her but never tasted her skin before. I looked at my sister's face, searching for a sign of disapproval... There were none... Leaning down, I ran the tip of my tongue around the areola of her right breast. I could feel the little bumps as my tongue traversed around and then I lapped over the top of Eleni's engorged, hard nipple. She gasped. I pushed my head forward, opened my lips wide and sucked as much of her ample breast into my mouth as I could. I pulled up on it until only her hardened nipple was still between my lips and raced the tip of my tongue back and forth over it. Then I shifted my mouth to her left breast and repeated what I had done to her right breast.
"How does it feel, honey?" said Kostas as he increased the pace.
"Mmmhhh..." She moaned to us.
She had no power to speak. She could only moan between heavy breathing. Then Kostas leaned over her, leaving me no space on her lovely tits. I reluctantly pulled myself back. That was not enough for me... Never enough... But that was all I was allowed. His lips found hers and after a few hard thrusts, he emptied his load in her womb.
"I love you, honey," said Kostas.
"I love you!" whispered Eleni.
They didn't stay long. After quickly collecting themselves, they went back to their room, leaving me alone in the living room. I didn't know whether they were doing me a favor or just torturing me. What was their purpose? Why were they doing this to me and to themselves? I read that some people had exhibitionist fetishes but this was far beyond exhibitionism. I had mixed feelings. Yes, I enjoyed every moment of these incidents. I was addicted to this and was looking forward to watching them again. The overwhelming feeling of guilt was gone for long. But it was replaced by curiosity. What we did was quite unusual... She was my sister and I had to know the motive of their actions.
My sister never spoke about these incidents with me. She behaved totally normal when Kostas was not around; like old times before this insanity. Despite the fact that I saw her naked several times, she always changed clothes behind closed doors, never letting me see more than usual. She treated me as her little brother rather than a pair of eyes watching her during her most intimate moments. I tried once to bring this subject up.
"Eleni," I said, "about last night..."
She interrupted me. "I'll make omelets for breakfast, how do you like it?"
She ignored my further attempts as well. She pretended as if nothing happened at night. She was just my big sister, nothing more... But I had to solve this mystery. I thought 'If she ignores me, then I should talk to Kostas'. So, I called him the other day.
"Hey, pal!"
"Hello, Kostas. How are you doing?"
"Great. How about you?"
"Not bad, not bad. Thanks. Look, I think we have to talk."
"Talk? Well, ok. Then... Talk!"
"Rather face to face. "
"Hmm, ok. Look, I'll be there tomorrow."
"No, no," I interrupted him. "I'd prefer us to be alone. Just you and I, ok? I don't want Eleni to be around."
"I see."
"So, do you have some time today?"
"All right. Look, why don't you come here now? I'm at my workshop."
"Now? Good. That's great. Then, I'll be there in an hour."
"Ok, I'm waiting."
"See you, then."
When I arrived there, he was working on a painting. He greeted me, offered me a beer. After a little chit chat, I came to the point.
"Kostas, I can't pretend anymore as if nothing happens. We need to talk about this. Eleni ignores my questions and never talks it."
"Aris, if she doesn't want to talk, maybe we should respect."
"Kostas. You don't understand. I have to know!" I interrupted him.
"Know what?"
"Everything. What's...What's happening now? I don't understand. I just don't understand. What are you up to? What kind of relationship is this?"
"It's a beautiful relationship, Aris. Your sister and I love each other and try to have fun, that's all.
"Kostas! What we do, it's not normal."
"Not normal, you say. Ok, Aris. Define normal."
"What?"