Marcy yawned. "Don't I ever get to eat or sleep?"
Dr. Villiers looked at his watch. "You were fed a big breakfast and instructed to eat it all. The animals will not be fed again until five, but in the meantime," he smiled down at her, "we'll certainly find something to put in your mouth that will make you forget all about food."
Marcy sighed resignedly. "All right. What do I do this time?"
"Assume a supine position, if you will, and…"
She started to lie down, but he stopped her. "No, on second thought, I shall lie down first and then I want you to position yourself facing my feet, with your cunt poised over my cock."
"Yea, Dr. Villiers," Marcy said, with her usual docile acceptance of his orders. She turned and faced his feet, and then lowered herself until the damp pubic hair was just touching the tip of his remarkable shaft.
"Yes, yes, that's it. Now just hold that position for a moment, will you please, my dear?" Dr. Villiers said, drawing a little diagram in his black notebook. "And now Kyle…"
"Yes, sir!" Kyle said eagerly, untangling himself from his sister. "Anything you say, Sir!"
"How would you like to insert your cock into X-999's vagina from the front, while I do the same from beneath her?"
"Wow, groovy, man, groovy!" Kyle enthused. "The very thought of feeling my insignificant prick pressed against your masterful phallus, of rubbing my sensitive flesh against yours while we both fuck X-999, is pure heaven."
"Hmmmm," Dr. Villiers said, making another note. "Previous indications of homosexual tendencies verified." He looked up at Marcy. "And you, my dear, do you think you can accommodate this massive insertion of male flesh I have outlined?"
Marcy's head was spinning, and her knees were weak. During the past two days of almost continual sex, she had fantasized about such a penetration, but now that she was faced with the actuality, she was stunned. "I'll – yes, I'll take it, no matter what."
"Excellent," Dr. Villiers said, making another mark in his book, and causing Marcy to wonder if he were chalking up brownie points for her.
"And what about us?" Mrs. Swenson asked. "That little sexpot gets all the cock and we get nothing?"
"X-999 'getting all the cock' is precisely the point of this experiment, Mrs. Swenson, so protesting the fact is pointless. However, there will be something for you and S-125 to do while S-124 and I are sheathing our cocks in the same furrow."
Excitedly, Kyle knelt between the other man's outstretched legs, his prick on a level with Marcy's open cunt. He stared down at the massive shaft poking at her entrance with undisguised longing. "If only I could have that perfect pylon thrust up to the balls in me! How I'd love to be flat on my belly, squirming in joy and pain as you pinned me to the floor and slammed into me until my soul was spaced out on cock!"
"Later, perhaps," Dr. Villiers said, "but I don't promise any soul spacing, whatever that may mean."
"Could we please hurry up and get started?" Marcy asked, rubbing her wet pubes over the rearing head of Villiers' shaft, feeling the controlled power of it and wanting it desperately.
"Very well, my dear, if you will lower yourself slowly until you are partially penetrated. Then Kyle, you will please insert your member between the upper portion of the coital canal…"
"They're going to split her right up the middle," Karla said, dropping to her hands and knees to get a better view of the two engorged cocks trying to enter Marcy at once.
"They sure are," Mrs. Swenson agreed. "They shouldn't try that with a punk kid like that." She had dropped to her hands and knees too, and was staring at the fantastic tableau. "Why don't you try it with me, Doctor? I could hold you both with room to spare."
"If you can do it, so can I," Marcy said. "Cunts are very stretchable, and I want them both in me at once."
"Well, I admire your spirit," Mrs. Swenson said, "but it looks to me like you're going to get more pain out of it than pleasure."
"Wouldn't it help if I warmed all three of you up first with my mouth?" Karla asked. "If I got Marcy good and wet, you guys might go in easier."
"I'm already as wet as I can get," Marcy said. "I'm dripping with three different brands of sex juice plus my own."
"Excellent spirit," Dr. Villiers noted in his little black book. "Test subject shows fine morale. Let us proceed."
"We are proceeding," Marcy said, lowering herself a bit more, until she could feel the gigantic cock pushing her open and expanding the inner labia. Then she held her position, slightly delirious with anticipation as Kyle approached her from the front. She wanted them both, and was determined to hold them if it killed her.
"Now, my boy – now!" Dr. Villiers ordered.
"Okay, here I come!"
Marcy felt Kyle's prick against her outer lips. There wasn't much room left there or inside. She could feel him shoving where there was no opening and being rejected.
"Closer to me, lad," Dr. Villiers instructed. "You've got to slide your cock along the bottom of mine, touching all the way, and enter that little stretched place beneath my glans."
"Yes, yes, glide all the way along yours… ahhhh!" Kyle looked as though he were about to faint with excitement as he pressed his manhood tight against Villiers' and shoved it along the underside, rubbing the sensitive head on the hard rod and whimpering like a girl. "Ohhhh… ahhhhh… so good, so could cum right now just from touching you this way."
"Don't you dare, you little beast!" Dr. Villiers said. "You'll ruin the experiment if you do. This isn't for your benefit, you know. This is experiment No. 55-00-9, Penetration of Virginal Cunt by Two Cocks. Do it right, dammit!"
"Oh God… that hard, hot flesh… the thickness… the monstrous, dangling balls… I can't stand it… I just can't!"
"Shut up, you silly fool," Mrs. Swenson said. "Shut up and do what the doctor tells you!"
Kyle had managed to work the nub of his organ past the outermost gates and was pushing into Marcy, spreading her just a little more. But he was still whimpering about his imminent explosion.
"If you cum now, you're going to ruin it all," his sister warned.
"I know, but it's so goooood. If you could just feel how how it is… how thick and…"
"Stop that! You're just getting yourself all overheated!" Karla said, and raised up until she could nip her brother at the base of his prick.
"Ow!" Kyle yelled, and his constantly hard shaft wilted a little. Quickly Marcy reached down and stuffed the sagging joint into the small opening to the side of Dr. Villiers' massiveness.
Kyle continued to howl, but it was with pleasure now as Dr. Villiers reared upward and sank all the way into Marcy, carrying Kyle's rehardening organ with him.
Marcy was sobbing now with the pleasure and the pain. She was being stretched beyond her wildest imaginings, as man meat filled every cranny of her cunt, bulging the resilient walls outward to make more room.
"They're in me – oh God, they're both in me!" Marcy squealed.
"I'd never have believed it," Karla said, examining the joining from around her brother's waist. "That tiny little cunt holding all that hard cock!"
"It's a miracle," Mrs. Swenson said, sticking her head around from the other side to get a close-up view of the coupling. "Look how the lips are pulled almost flat."
"I think I'm going to faint," Marcy said suddenly. "My head is going round and round and I feel so weak and funny."
"Don't let it concern you, my dear," Dr. Villiers said. "You'll be held up by our cocks even if you do pass out, so don't worry, the experiment will go right on."
CHAPTER SIX
When Marcy returned to consciousness, she became acutely aware of the pleasure-pain of being expanded like a rubber band around the combined cocks of Dr. Villiers and Kyle Karlow.
"You will note," Dr. Villiers was saying in his cool, objective voice, "that in spite of her recent virginal state, X-999 is fully capable of absorbing two good-sized male organs. You will also note that she lapsed into unconsciousness more from an excess of ecstasy than from the pain of the unusual penetration. This young woman has a remarkably high sexual quotient for one so recently a virgin. She must have been smoldering like a sleeping volcano for her first twenty-two years, and she has now burst forth into a person ready and eager to take part in any sexual excess."