Chapter 6: Rebecca, Sam and Cyn

"Oh Fuck, Nicky. Can't you fucking well keep your cock in the four holes you already have. Oh, no. You had to go and find another one or two to stick your fucking fat cock in. Fuck! Fuck! You are a fuckwit Nicky. You should have just come to me and I would have fixed Cyn right up. Well I'm not having it. I'm not sharing you with anyone other than Sam. This is not a free for all. You are MY brother. Your cock belongs to me. Sam gets to use it because of Dad but that was it. Let me think. FUCK!"

Rebecca was saying this while at the same time she continued to push herself up and down on my cock. I had gone to her room and figured that the best time to tell her was while she was fucking me. Considering she was bending my cock so far forward it started to feel like she was trying to break it off, I started to reconsider that bright idea.

"I don't want to look at you right now Nicky. You stay on your back. Don't you dare come anywhere near me. Oh, Fuck."

Rebecca had dropped back almost lying flat along my legs but she was still very enthusiastically fucking back and forward on my cock. So telling me not to come anywhere near her was a bit difficult. We had been fucking for a long time already and despite the discomfort of having a very hard cock pulled downwards the way it was, Rebecca's cunt muscles were so strong and she was exerting so much pressure on my cock that I couldn't help it and came anyway. This was a very BAD thing and Rebecca went off her tiny little brain.

After abusing me for being an inconsiderate oaf and not caring about her needs; And being selfish; And fucking anything that moved; Rebecca called out loudly for Cyndi and Samantha.

They had not been very far away because I had told them that I had to tell Rebecca and Samantha especially had been waiting for the fireworks. It was close to bedtime and Sam had on a robe over the lingerie I could just see peaking in the V of the robe. Cyn just had a robe on, thin enough to see that she had little else on underneath. Samantha appeared upset and close to terrified. Cyn had a rather defiant look on her face.

Rebecca first addressed Sam:

"What did I tell you, Samantha. Nicky was not to be shared. So what do you do the very next day. Invite your sister to screw her brains out on OUR cock. For someone so bright you really are a fucking idiot."

Rebecca fixed Sam with a stare and Samantha's bottom lip started to tremble but she did stand there and looked back at Rebecca. Rebecca then turned her attention to Cyn:

"Well, you little Cunt, I have a good mind to run to your Mommy when they come home and tell them about how you fucked anything that moved. I can guarantee your mother will then inspect you and it will be pretty fucking obvious that you are not a virgin. But that could backfire and Nicky could lose Sam as well because I can't see you keeping quiet when faced with the type of punishment your father would dish out. Your Dad is nothing but a pervert and a sadist as far as I can tell. Having you strip naked and bend over with your legs apart to belt you seems to be a rather convenient way for him to stare straight up your cunt and Sam's too. Maybe if you offered to let him stick his cock in you we could solve all our problems."

Cyn looked rather disturbed. I'm sure she thought Rebecca was serious and I wasn't altogether sure she wasn't. Rebecca continued:

"Well, if you are going to fuck Nicky, you're going to make up for the fucks I miss out on. Strip! NOW!"

Cyn actually obeyed and took off her nightwear, standing in Rebecca's bedroom with her hands covering her pussy. Rebecca slapped them away and then told her that her stray hairs were unsightly and would have to go. She turned to Rebecca and me, while she herself was shucking off her limited clothing and said that we might as well all be naked.

Very nervously Samantha removed her clothing, as she normally did folding them neatly and laying them on a chair. She stood there naked. I too stood there naked.

Rebecca ordered Cyn to lie on the bed with her legs spread and her feet planted on the bed. Cyn looked terrified but complied. Rebecca said she wasn't going to force Cyndi to do anything so she could get up now and leave if she wanted to as long as she kept her mouth shut and left me alone from that time on. If she wanted to fuck me then she would do whatever Rebecca told her to do. She ended this with:

"Is that clear"

In a voice that sounded very much like a very frightened little girl Cyn replied:

"Yes. I'll do what you want."

Cyndi was lying on the bed trembling biting her bottom lip as he watched Rebecca occasionally looking over at Sam and I, her eyes pleading silently. But there was nothing we could do.

Without any preliminaries at all, Rebecca climbed up on the bed between Cyn's legs and started to run her tongue from her puckered little arsehole all the way to her clit. Cyn was in shock. Rebecca then pulled Cyn's legs roughly and said for her to shove her arse further into the air because she couldn't reach all of her and Cyn complied.

Rebecca then proceeded to quite expertly slurp on Cyn's pussy alternating between sliding her tongue right along her slit and arsehole with little nips on her pussy lips and suckling on her clit. It didn't take long before Cyn was going bananas. She was moaning constantly and then started to gasp:

"Oh fuck. Rebecca. You're going to make me cum. I can't stand this. I'm not a les. Please stop this. Oh, fuck."

With that Cyn started to shake violently, dropped her legs down and clamped my sister's head between her legs as she obviously was having quite a violent and extended orgasm.

Samantha had moved next to me and was holding my hand and shaking. She whispered to me:

"Rebecca isn't going to do that to me is she? I only want you Nicky. I don't want a girl, even your sister having sex with me. It just isn't right!"

I was very annoyed at the antics of my lovely sister at the time but I was also pissed. This was Cyndi's fault and now it looked like I was going to have to share Sam with my sister and I felt very very jealous. She was my girlfriend! I loved her. I didn't want her having sex with anyone else, male or female. Being too young to realise just how much you can hurt someone just with words in such a situation, or just how hypocritical it was to be upset that Sam might have sex with Rebecca when I was happily fucking both of them every day, I snapped at Sam:

"It's your own fault. If you had been a bit more careful with your sister we wouldn't be in this problem. Then coming up with the forced sex idea just made everything so much worse. Now Rebecca is really pissed at all of us and if you end up having sex with her it is your fault. Well mostly your conniving little sister's fault but you share the blame. It looks like you are going to be shared. I DO NOT want you shared with anyone. It is like you are cheating. I'm not sure I can take it. Damn it. Damn you. And fuck Cyn."

I drew a breath then continued:

"But why should you complain. You've already had Rebecca's tongue right down your throat and fondled each other. What did you think I wouldn't notice your nipple being pulled by Rebecca and you returning her kiss so passionately. Did you think I'd be happy you deciding to be with someone else without even talking to me about it? Well fuck you. What's the difference? Rebecca's already fondled you without you having any complaints. The only difference is now you'll have to return the favour. I'm sure you'll find that just as enjoyable."