I'd like to thank Steven for giving me the inspiration to write this story.
With Erin and her brother Brett both lusting over Susan, they clear the air.
As if Susan was an important part of an invited threesome to watch them having sex, instead of an uninvited intruder, when she left Erin's room, even though brother and sister were still naked, the sexual energy left the room with her. Weird that there was plenty of sexual energy before Susan arrived unannounced but as if she turned off a light switch with her departure, the sexual, incestuous lust was gone. Obviously more thinking about eating, fingering, and licking Susan's pussy, Brett lost interest in eating, fingering, and licking his sister's pussy.
Besides, thinking that they were alone in the big house before and now with Susan in the house and down the hall in her bedroom, Brett felt uncomfortably embarrassed. It was there dirty, little, incestuous secret, Erin wanting to have sex with her brother as much as he wanted to have sex with his sister. Now that he knows that she likes to watch, maybe she likes to listen too. In the way that he's listened to his mother and father having sex, he didn't feel comfortable having Susan listening to him having sex with his sister. It was one thing for him to eavesdrop on others, but he didn't want someone eavesdropping on him.
Feeling as if he was cheating on his beloved Susan by having sex with his sister, Erin, he felt that she may be in her room and at her door listening to them having sex. With his sister's bedroom door closed, too creepy, for all he knew Susan could be outside Erin's bedroom door in the hall listening to all that they say and all that they do. Not wanting to make a sound, wanting to have silent sex, an impossible thing to do when having sex with his vocal sister, he didn't want Susan knowing what they were doing and overhearing what they were saying. Something that he was so careful not to be found out doing before, now with Susan knowing his secret, his secret, incestuous affair with his sister was no longer a secret.
Not able to pass the test of someone else's scrutiny, now with someone else knowing his sexy secret, he felt perverted. He felt nasty. He felt compelled to deny should Susan tell his parents that he had sex with his sister. Something he didn't feel bad about before, he felt as if he was doing something wrong in having incestuous sex with his sister now.
As far as Erin was concerned, she seemed unfazed by Susan's surprise intrusion. If anything, more sexually aroused than bothered by her watching them having sex, it was obvious that she didn't care that Susan was in the house, was within earshot of hearing them having sex, or sitting in Erin's bedroom watching them having sex. If anything, now knowing that Susan was there listening, appreciating the unplanned audience, instead of trying to be quiet, she'd yell and scream her orgasmic pleasure, perhaps for the sake of sexually arousing Susan.
Obviously Erin didn't care that Susan knew that she was having sex with her brother. No doubt one day soon, she'd use Susan catching her having sex with her brother as her justifiable excuse to seduce Susan too. Being that she's already seen Erin naked and appeared to be enamored with her naked body, it's only a small step to them having a lesbian affair. In the way that Susan watched him having sex with his sister, he wondered if they'd allow him to watch them having sex with one another. Just as he'd love to watch Erin licking Susan's pussy, he'd love to watch Susan licking Erin's pussy.
His sister was such a slut, she'd do every sexual thing. Man or woman, she'd do anyone. Only, he didn't know that she swung both ways until he saw the way she was looking at Susan, the same sexy way that Susan was looking at her. Nonetheless Susan's interruption, wanting to get something more out of this incestuous session than sexual frustration, Brett looked at his sister as if she was just another whore he picked up and accompanied her home.
Seemingly, even though he loved his sister and lusted over his sister, he no longer respected his sister for having sex with so very different men, not that he ever respected her. Bad enough she was a slut, a whore, and an incestuous pig, she was a bitch. It's funny how even though he was all of those things too, he still positioned himself higher up on his imaginary pedestal when his sister was no longer perched on his pedestal.
"Blow me," he said to Erin. Perhaps he wanted his sister to blow him while he imagined it was Susan blowing him. "Suck my cock," he said kneeling on her bed and with his stiff prick so very close to her lips. Moving closer to her, he positioned his engorged cock by her mouth.
As if she wanted to suck him, she stared at his cock for a long moment before looking up at him with a look that told him that she was going to be difficult.
"No," she said. "I'm not going to suck you Brett. I won't do that. Sorry. Get that thing out of my face," she said appearing as if she was going to grab his cock but instead slowly swatting it away with her hand as if she couldn't help herself from touching it.
Even though she seemingly rejected him, he saw how she looked at his cock. It was obvious that he sexually excited her when he stuck his big, hard prick in her face. Maybe she likes being forced and taken. Maybe that's her thing. Maybe this whole thing is just a game to her. Maybe she wants him to force her so that, should she be discovered having sex with her brother by her parents, she can blame him.
"It was all his fault," he imagined her saying while crying crocodile tears and blaming him for having his forbidden way with his sister. "He forced me to have sex with him."
He didn't care if she blamed him for having sex with her. It didn't matter if his parents were angry at him for forcing himself upon his sister. Now that he was in her bedroom and she was naked too, the important thing now was that she suck him. Feeling so horny and so sexually frustrated, he need to cum in his sister's mouth.
"C'mon Erin. I'm horny. I need to cum," he said. "Let me cum in your mouth. Please?"
She played her part as the innocent sister, as if forced to have sex with her incestuous brother. With their incestuous romance seemingly doomed and over when it only just started, she looked at him with distain. She looked at him as if he had forced himself in her room and forced himself upon her when she was the one who invited him in her room. Quite obviously, she invited him in her room not to talk but, with her having ulterior, sexual motives, she invited him in her room for sex.
She was the one who asked to see his cock. As if she's never seen a cock before, she was the one who stared at his cock in the way that he stared at her tits. She was the one who wanted to measure his cock. She was the one who was eager to strip off her clothes to show her brother her naked body. She was the one who wanted him to cum in a God damn measuring cup instead of cumming in her mouth with her swallowing his cum. Obviously, with her as wicked and as horny as he was, she wanted him as much as he wanted her. Yet, had he not left her room to get the measuring cup, he'd still be eating his sister. Had Susan not entered Erin's bedroom on the pretense of watching them having sex, they'd be having sex right now instead of all of this back and forth nonsense with him begging her for a blowjob.
"Go ask Susan to suck you," said Erin with spite. "In the way she was staring at your cock, maybe she'll blow you."
Filled with sexual arousal by the thought of beautiful Susan sucking his cock, he was there now naked with his naked sister and not with Susan. Being that she was the one there at their little incest party, so to speak, she was the one that he wanted. He looked at her with a face full of sexual frustration and she looked at him with a face full of jealousy, no doubt that he lusted over Susan when he was naked and while having sex with her.
"You said you'd suck my cock if I ate your pussy and I just ate your pussy," he said wiping more of her vaginal secretions from his face. "That was the deal we had. I kept my end of the bargain and I expect you to keep your end of the bargain too. Now it's your turn to keep your end of the deal by sucking my cock," he said holding his cock in his hand and lifting it as if presenting it to her.
He smelled of his sister. He wreaked of her. Her scents were all over his naked body, her hair spray, her perfume, and her sexual smell. A mixture of musk, lemon, and floral scents, it wasn't an unpleasant aroma but an erotically arousing one. If anything, he liked the smell of her.
He could still taste her on his lips, on his tongue, and in his mouth. He smelled of sex and feeling like the sexual animal that he was, he liked the smell. The smell of her pussy made him feel like a man who just had his way with his sister, something that men have done since the beginning of time. Even though his sister was so very bitch, he loved the sound of her voice. She had a musical voice and if he ever was to marry, he'd want a woman who sounded like his sister.
"What I said Brett was that I'd suck your cock after you gave me an orgasm," she said with conviction as if she was a Philadelphia lawyer grilling him on the witness stand.
