Deceit of he mind?

I was in a classic missionary position and The Lovely Chris (TLC) was buried deep inside me. He wasn’t banging me through the bed or anything like that, in fact all he was doing was gently pushing and relaxing and also flexing his cock inside me. There was barely any movement of his body at all, but it felt delicious!

And suddenly….out of nowhere, Miss Brain got a sheet of clear acetate out and overlaid an entire scenario on the entire proceedings. Suddenly TLC was not my sister’s boyfriend, Chris was my brother, and I was his younger sister. We hadn’t been engaging in pre-arranged sexual foreplay leading to equally pre-arranged sex, we had simply been goofing around and somehow, it had got to this…both of us still fully clothed, his dick jutting out from his jeans and my panties pulled aside. The moment the mental image of me being fucked by my own brother dropped into,place, so did the entire gorgeous nastiness of it. When I fantasise, I commit 100% to whatever image or role Miss Brain gives me, but why now? TLC…being fucked  by TLC is enough to make any girl cum. He is the most selfless and accomplished of lovers, so why, I wonder did I need this overlay of a fantasy? 

Then again, who cares? As the tendrils of the self-imposed role,play spread through me and it took more tangible root in my mind, so I began not only to live it, but to verbalise it, and TLC, but the brilliant lover he is, caught it immediately and ran with it. 

“Chris! What are we doing? You’re my brother!” 

“I know….oh fuck Anna….I’ve wanted to do you for ages. Don’t make me stop.”

“Well…ok…but don’t make any noise. Mum would kill us if she finds out.” (Actually, she wouldn’t! Mum is the most sexually liberated person I know….apart from me.)

“Ok….we’ll keep it quiet.”

He carried on fucking me exactly as he had been, almost with no physical movement, and nothing that would make the bed springs squeak. It all felt rather delectably naughty. 

“It didn’t….hurt…too much did it…..when I put it in?”

“Well, it stung and I think I bled a little….but it feels much better now.” (Unlike losing my cherry to my candle which stung like a cunt and didn’t feel nice for two or three attempts afterwards.) 

I felt him grow inside me. 

“You mustn’t cum in me Chris. I’m not on birth control.”

“Shit! Aren’t you? I thought you were?”

“No….not yet….oh fuck this feels good! “

“There you are! I knew you’d like it. This is way better than just smelling your panties.”

“Ew! You do that?”

“Anna, I’ve been doing that for months. I take them from your hamper and smell you on them while I Jack off, then, when I’m about to cum, I cum right into the crotch…where your wet cunt has been,” 

I make myself shudder under him. “I……like that dirty word. Dirty words make me feel horny.”

“Imagine me shooting my spunk on your cunt juices then.”

“Well….it explains mum asking me if I was ‘doing it’.” 

He quite deliberately stops all movement. And he knows why. He also knows what I’ll say. “Ohh no…don’t stop. Keep….fucking…me.” 

He smiles down at me. “My kid sis is cock happy.” 

He resumes his deliberately minimal and almost totally silent fucking. It now has an edge to it…a naughtiness…. I don’t have a brother in real life, and the question flits through my head ‘If you had, would you have had sex with him?’ The question is almost contemptible. Of course I would! I has sex with my sister, and once with my dad. Don’t be silly, Anna, of course you would have. 

“Oh fuck…..ohhh fuuuuuuuuuckkk…Annnaaaaaa!”

My attention snaps back to my ‘brother’. His face is a deep red and I feel regular pulses inside me. He’s cumming in me! The mere thought sets me off and despite the spike of role-play fear the thought of pregnancy part, I cum on his throbbing cock. “Fuck me! Cum in me! Make me pregnant!” 

I can’t whisper any more to him, since what I thought would be a big,orgasm turns into something from another dimension. For an instant, he is my brother…..for an instant, he is 17, I am 16. Everything is so wrong about this, yet everything is so right. I even imagine I can feel his sperm swimming deep into my womb. The real world ceases to exist, and I’m blasted apart, atom by atom as I cum…and cum….and cum. 

Afterwards, we lie side by side. His cock lies semi erect on his jeans and I feel semen leaking from me into the crotch of my grey cotton undies. Just lately, I’ve been drawn to grey cotton panties. Somehow they feel….hmm….dirtier, in a way. A dirty colour, for a dirty girl. 

Finally TLC speaks. “Wow….that was….immense.” He pauses “I enjoy being your brother. We must do that again.” He falls silent, and I lean forward and take his cock into my mouth. A couple of sucks and he his hard again. 

“Well then…..how about cumming down your sister’s throat?” I say it almost as a throw away…just to keep the fantasy rolling, but then he moans a name…..and it isn’t mine. You see TLC does have a sister, so when he moans “Oh fuck, Kirsty….yessss.” It becomes my turn to instantly drop into his fantasy. He doesn’t take long and cums into my mouth. 

Well, of course,I had to ask….wouldn’t you? No, he has never done anything with Kirsty. Yes, he says he has smelled her panties a couple of times when he was younger. Would he do with her what he has just done with me? He rolls to face me. “Never say never. I doubt she would ever look at me in that way but…..well…..never say never.” 

For once I suppress what’s going through Miss Brain. No, maybe not suppress….more like file away for later. I desperately want him to fuck me and call me Kirsty, and preferably fuck men up the bum, but I decide to make that the subject of another time. I do send him away with some homework though. 

“When you next come to visit me, bring two pairs of Kirsty’s panties. Ideally on one of her ‘wet’ days.” He looks at me with bright twinkles in both eyes, he knows what’s to come….

….but not as well as I do!.