"I've got a request." My sister-in-law and I were sunbathing naked in my garden. We'd had a couple of drinks and were nicely relaxed.
"Uh huh."
"Most people would think it pervy and disgusting, and although I know you are perverted and disgusting it may even cross your strange code."
"Try me." My hand went to my pussy in anticipation.
"Well, you know you said that you didn't like big things up your bum."
"Yeah."
"And your husband has, well, a big thing."
"Yeah." I genuinely didn't spot where she was going.
"And I do like big things up my bum ..."
Ah. Got there now.
"You want Mark to fuck your arse?"
"Well, yes, if you wouldn't mind, but that's not all of it."
Dear God, what else?
"Well, I wondered if we got a dildo that was exactly the same size as Mark ..."
"Already have one."
"Great. Anyway, if Mark fucked my arse at exactly the same time as you fucked Nat's with an identical sized cock. Sorry if it's too weird - I've just been playing with the idea."
"And playing with yourself with it, I notice." She was squirming nicely on her hand while telling me.
"Mmm. What do you think? I mean, doesn't Mark miss having an ass to fuck?"
"Yeah, probably. I don't encourage him to fuck other women's bottoms."
"Oh, Sure. Sorry."
"But it does sound sexy. Can I think about it?"
"Of course."
"Would you like to try the Mark sized dildo anyway?"
"You want to fuck my ass, you mean?"
"Well you did do mine,"
"Well, Nat doesn't encourage me to let women fuck my bottom. But it does sound sexy. Can I think about it?"
"Touche." We dozed in the sun, each thinking dirty thoughts.
Later she said, "How big is his cock? I mean I saw it in that video, but I couldn't really tell."
"I've seen bigger in porn, but never in real life. I've seen quite a lot, but obviously not enough, because statistically one person in a hundred is actually bigger than him. Look, I really have got a dildo exactly his size, I'll show you." I went into the house and fetched it, on the way back noticing how sexy she looked, lying there naked and rubbing her cunt. I decided.
"Annie, can I put this on now and fuck you up the bum?"
"Does that mean Mark will be doing the same thing some time later?"
"Yep."
I'm not going to give you a blow by blow of what happened next, I'm afraid. It was good, and boy did she like having that large thing up her - came like her life depended on it. I'm sorry you're going to miss out on that as I'm going to fast-forward to the following Saturday. But first I need to tell you of a little conversation we had after I fucked her.
I was having slight concerns over Nat's feelings - after all, she wanted Mark's cock specifically because it was bigger than his. Nat's cock is perfectly nice, but I worried he might get a complex about it. Annie claimed not.
"Look, Nat's got a nice but normal cock, and I have a bit of thing for big ones. I've got slightly small tits, and Nat's excited by much larger ones. I don't take his predilection as a judgment on me, so I don't see why he would judge mine."
For some reason I suddenly remembered Annie's sister, Chelsea, has massive tits, and said, "So if, for the sake of argument, he wanted to cum all over Chelsea's tits, you'd be fine with it?" There must surely have been some sibling envy at some point.
Her hand went down to cunt again as she considered. "Interesting thought. If you'd asked me a couple of weeks ago I'd have been horrified, but since you've been corrupting me I'm not so sure. Anyway, Chelsea's a complete prude - no chance there."
I'd only met Chelsea a couple of times, and to be honest her tits were the only thing I really knew about her. Suddenly the thought of my brother coming all over them was a big turn on. I kept thinking about it in the days coming up to our little foursome.
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