Originally Posted by Carnevil9
I assume he does her "doggy style" while she is in the doggy door!
I also thought something like this.
But what about this version: He sees his sister stuck in the door. For some reasons (a tattoo, a special mole, a scar or something like that), he knows for sure that it is his sister, and not some kind of nude burglar.
So the brother starts to think: this is the ideal moment. It is the back door, so no one can see them, unless someone is in the garden. So brother thinks he wants to have some fun with her.
Maybe he wants to get revenge for something. Or maybe he was always horny for his sister. Anyway - he doesn't say a word. At first he takes some pictures with his cell phone. But then ... he goes down and starts to lick her pussy and her butthole (or maybe just the pussy, depending if he is as perverted as I am).
All the time, sister doesn't know that someone is behind her, watching her nude ass. So when she feels some tongue, she starts to scream "Who the fuck is licking me? Stop this and help me get out. I mean it, please help me to get out. I am stuck in this damn dog door since 2 hours."
Brother just keeps on licking her, until she becomes wet and - Sister can't deny it - she becomes horny, too.
"Oh, you are licking good. If you want, you can fuck me, too - but please, pull me out afterwards"
Brother starts to think: at first he only thought about licking her. But since sister invited him to fuck her - why not. So he goes behind her and fucks her.
Finally he cums into her pussy. He takes some more pictures, then he leaves. His sister starts to scream "What the hell - you fucked me, now pull me out."
He goes around the house and silently opens the front door. He waits 5 minutes, then he enters the kitchen. And what a surprise - his sister is stuck in the dog door, naked.
"Hey sister, what has happened?"
"I took a shower, when I heard something. I wanted to find out what it was, so I entered the backyard, just wearing a towel. But the door slammed shut and caught the towel. So I wanted to get back in through the dog door, but so I had to take off my towel. And then I got stuck in the dog door. And the worst is: someone came along, and started to lick me. He even fucked me, but he didn't help me out."
"Well, maybe it wasn't a guy. Just when I came home, I saw the dog of the neighbours, running away from our house."
"You mean, I have been fucked by a dog? That would be so sick. But now help me out."
"Hey sister, what about this - I pull you out - but before that you give me a blowjob.
"Yeah right, and then you want to fuck my pussy, like this other guy."
"Well, you allowed this guy to fuck you, if he helps you out"
"Wait a second - I never told you that. You have been the one who fucked me. My own brother - but at least it wasn't the dog. O.k. I will give you a blowjob, but pull me out first. This isn't the right position for a blowjob ..."