In the next photograph, the woman was sucking the man's cock and playing with his balls. Considering the size of the thick piece of meat, Bobbi couldn't understand how she was able to take so much of it. It was all inside her mouth and throat except for perhaps two inches, and the man's big tool had looked to be ten inches long at least. He was stretched back with his thighs spread, and the balls in her hand looked wet and slimy. Bobbi wondered if the woman had been licking them with her tongue!
The girl's groin was catching on fire now, and she forced two fingers deeply into the cleft of her vagina. She knew how far she could push before the pain started.
Damn my virginity! she thought. I'll have to get rid of it one of these days!
In the next photograph, the man was pushing something up inside the woman's pussy. It was round and long and white, with little ridges running along the sides. Bobbi had never seen a vibrator, but she had come upon an ad in the back of a magazine once that had a drawing of one. This must surely be what the man was using. The girl knew that the plastic object had a battery inside, and that when it was turned on, it made tingling sensations. She closed her eyes for a moment and pretended that it was her own pussy that was getting the vibrator shoved into it. She wished the man in the picture could have been in the bed with her now, pushing her back, spreading her legs! She wondered if her father had a cock so big and thick and fat and beautiful looking, if he ever did these things with Mama, Bobbi's fingers began to move quickly back and forth in her hot little hole now, and the sensation was going to be one of the most intense she'd ever experienced, she knew that for sure! She and her girlfriends had been masturbating alone and with one another for over a year now, and each time seemed to be better and better.
In the next picture, the woman had pushed the man onto his stomach, and she was working the same vibrator up between the cheeks of his ass, shoving it right into his hole!
Oh, no! the little girl thought. Surely a man couldn't, or could he?
The fingers in her pussy were beginning to feel moist.
Downstairs, Teddy was getting bored. It was past time for Cal Malone to show up. Cal was a good friend, but he sometimes forgot the dates he made. Teddy got another glass of milk from the refrigerator, drank it down, and then went upstairs. He decided to sit in his bedroom with the door open and work on a song that was still needed for the school play. If the doorbell rang, he'd hear it.
When he passed Bobbi's room, the "ohhhhhhh" sound he heard was barely audible, but it was enough to make him stop and listen. Normally, he didn't spy on his sister, or anybody else, but there was something in her voice that held his attention.
Bobbi was on her back now, her legs spread and lifted. Her two fingers continued to work their way in and out of her small hole, and she held the magazine up in front of her face. It wasn't necessary to turn any more pages. The photograph she stared at was all she would want to see until her orgasm finally came.
It was a picture of the man's cock penetrating deeply into the woman's pussy. It was a closeup shot. Her legs were pushed up as she lay on her back, and he was on his knees, slightly over her. In the picture, his cock seemed to be coming straight down from above. His balls were tightening up, and nothing was hidden from view. Every hair on her vagina shone in the brilliant light of the picture, and her pussy looked stretched to the breaking point. Bobbi's heart was pounding as she looked at the picture and fingered herself.
"Owwwwwww,!" she grunted softly.
To Teddy, Bobbi sounded almost like she was in pain. He knocked lightly on the door, but there was no answer.
Bobbi didn't hear the knock. Her eyes opened and closed as she began to gyrate her hips and work her fingers in little circular motions. She didn't hear Teddy's voice when he called "Bobbi?" softly from the hallway. In her passion, she could hear only the thrashing sounds she was making on the bed, and the pounding of her heart.
Teddy heard the thrashing sounds too. He wondered if someone were in the room with his sister. That was impossible, he thought, but he tried the door and found that it was unlocked. He opened it a couple of inches and peeked in.
It was the first time he'd seen his sister naked. He had seen her in bathing suits and shorts, of course, but never like this. She had taken off her jeans and unbuttoned her plaid shirt so that it fell away from her body. Her small but beautifully formed breasts were heaving, and he hadn't realized she had so much in that department. Her lovely legs he was familiar with, but he'd never realized what a pretty tummy and ass she had. With her legs lifted the way they were, he had a perfect view of almost every inch of her. He knew exactly what she was doing to herself, but it was a shock. Sure, the guys at school talked about girls doing this sort of thing, but his own sister, he never thought he'd see it with his own eyes!
Then Teddy's eyes caught sight of the magazine that she held in her hand. The page was folded back, and the picture he saw was the one where the man was holding the woman's pussy wide open. Even from across the room, the boy had no trouble seeing exactly what the picture was. He knew that all the pictures in the magazine his sister was reading must be of a similar nature. Where on earth had she gotten such a book? And what was it doing to her?
The boy watched his sister's fingers diving in and out between the lips of her pussy. He felt almost embarrassed to be staring at Bobbi's most private parts, but he couldn't take his eyes away. Also, he felt a swelling in the front of his jeans and a rush of heat like he'd never felt in his life.
While he watched her masturbate, he reached down and saw that his cock was rock hard. He'd played with it many times, even had mutual jerk-offs with some of his friends, but this was different from any sensation he'd ever felt. It was as though hot oil was replacing the blood that ran in every vein of his young crotch.
He wasn't really aware of unzipping his jeans and taking his cock out. Before he knew what happened, it was in his hand, and he was pulling it slowly back and forth, watching his sister roll from side to side now. She dropped the magazine on the bed alongside her, and her eyes were tightly shut as she continued to tear at her pussy with her fingers. She used both hands now, and they seemed to be fighting one another for a feel of the soft, throbbing vagina.
Teddy began to jerk himself harder. He grabbed his balls with his left hand, and his right fist made a blur as he beat his meat with increasing fury. His own breathing was getting as heavy and loud as his sister's, but he didn't care whether she heard him or not. He couldn't help himself. The twins had always reacted similarly in emotional situations. This was no different. His excitement and passion were beginning to match hers, even without the benefit of the sexy photographs. He saw the other books lying around on her bed, and he knew they were probably just as sexy, but at the moment all he cared about was the sight of her naked crotch, bucking in the air, twisting and turning and heaving,
His cock was just large enough to make a good fist-full. He knew he was better equipped than a lot of boys his age, but he'd never given his size much thought. He wondered now if he might not be exactly the right size to fit into Bobbi. The thought of trying to fuck his sister pushed him over the edge, and he had to use all his willpower to keep from crying out when his cum began to gush into his palm. He put both hands down then to catch it. It was more than he'd ever come before, and it was beginning to drip and ooze through his fingers.
"Aaaggghhhh!!" Bobbi cried. She didn't care who heard her, and she didn't know anyone was listening, let alone watching. Her back arched high into the air and froze there, every muscle and nerve of her body at the breaking point. An expression of both pain and rapture came over her face, and slowly, slowly, her clutching pussy let her fingers slide back out of her vagina. Then she sank heavily down on the bed in a state of exhaustion.