Adam was awakened by a sudden sharp pain in a sensitive area that occurred when he rolled over in bed. His penis was rock-hard, painfully stiff. Well, it wasn't the first time he'd woken up like that, he could deal with that "single-handed", as it were. However, when he opened his eyes, the sight of his room distracted him momentarily from his throbbing member.
His room was almost bare, apart from the army cot that had somehow replaced his bed, a metal desk and chair, and an old lamp with a bare bulb. He barely had time to take this in - Where's all my stuff? - when he found himself springing to his feet, and walking, stark naked and still painfully erect, out into the hall. He couldn't stop himself. It was as though his body was moving on its own!
His astonishment increased when he saw the hallway. This was not the house he had gone to sleep in! The house was huge, with long hallways, and decorated with a weird mixture of ornate furnishings straight out of a billionaire's dream and pictures of singers and anime and other characters that he recognized as favorites of his younger sister Amy.
What's going on? and - Ow! - How long is this hard-on going to last? I should've either came or "calmed down" by now!
Adam walked down the hall and entered what turned out to be a huge dining room. His younger sister Amy was sitting in a huge chair - almost a throne - at one end of a long dining table, eating her breakfast off an elegant ceramic plate, using gleaming silverware, and drinking out of a Waterford crystal cup. Amy was wearing a long, elegant silk dress, and her hair was long, and elegantly coiffed. She wore a diamond tiara, and matching diamond earrings and necklace. She looked gorgeous, like a princess. Standing at attention behind her chair were two girls in maid uniforms, one a busty blonde, and the other a pretty brunette. Adam dimly recognized them as Karen Swenson and Maria Vitelli, Amy's arch-nemeses. He began to have an awful feeling that somehow life had taken a sudden turn in Amy's favor, and that a lot of people - himself included - were going to wish that it hadn't.
Bizarrely, his older sister Aly, was sitting at the table, chattering away on her cell phone as though everything were normal, and this despite the fact that she herself was dressed like a cross between a lolicon's wet dream and a giant pink cupcake. She looked up and gave her usual perfunctory "good morning" wave and continued talking, taking no apparent notice of his nudity or still rampant erection.
Adam's legs now carried him over to where his sister Amy sat. He dropped to all fours, and kissed her feet, and said:
"Good morning, Great and Wonderful Sister, Queen of All She Surveys!"
Yep, this is bad, thought Adam. He rose to his feet, and began walking towards where his sister Aly sat. Without interrupting her conversation, she got up our her chair and lay on the floor, lifting her voluminous skirt and removing a pair of lacy pink panties. Adam could see her vagina, glistening with wetness.
Oh,no, he thought, Oh, no, no, no...
He dropped to all fours again and mounted Aly, pumping away vigorously, she in turn thrusting upwards as he thrust downwards. Eventually, they convulsed in mutual climax, she wrapping her legs around him to force him as deep into her as possible. Finally, she stopped talking and let out a long, low, wailing moan of ecstasy. Their joint orgasm lasted an impossible ten minutes until Adam felt sure that he must have shot all of the fluid in his body into Aly's. When they were done at last, Adam sat back on the floor, panting. Aly sat up and licked the residue off his now-flaccid penis before drying it with her hair. Karen came over with a towel and dried off Aly's crotch, and helped her put her panties back on. Aly sat back in her chair and resumed her conversation as though nothing had happened. Maria came over with a mop and began cleaning up the considerable amount of fluid that was on the floor.
As Adam sat on the floor getting his breath back, he heard a voice in his head. It sounded like the voice of his own thoughts, and yet somehow, he knew that it was not.
Don't worry, Adam. She won't get pregnant or anything. In fact, she never even noticed that it happened. I have no intention of breeding you two - with each other.
Adam got unsteadily to his feet, and walked over to where Amy sat. She smiled evilly at him, and said...