"I'll promise to be here, but only if you make good grades, little brother."
"Promise."
The sound of the doorbell startled them all.
"Now who could that be?" Barbara asked.
"I'll get it, Mom," Kenney replied, scooting from his chair.
"Don't let them in here," Barbara said quickly, glancing at Julie. "Julie, maybe you better run to your room."
"Bullshit," Julie snorted. "I don't care who sees me like this."
Barbara started to exert her authority, but stopped, her eyes bulging and mouth dropping. "Kenney, I told you…"
Her son was bringing Mark into the dining room.
"Hello, darling," Julie greeted the pop-eyed boy. "I was wondering when you'd visit again."
Barbara glanced from Mark to her daughter, confusion on her face. Julie saw and laughed. "Oh, don't worry, mother. Mark and I are old fucking buddies, aren't we, Mark?"
Mark was just as confused as Barbara. He tried to avert his eyes from Julie's naked breasts, but was having a difficult time of it.
"Julie, I thought we talked…
But Julie interrupted her mother. "Mother, Mark is in on this secret of ours. I've fucked Kenney and Mark both before. He knows about it."
"He knows… " Barbara was blushing slightly.
"Well, not about you," Julie said. "Only Kenney and me. But what the hell, didn't we just discuss boyfriends and girlfriends, even husbands and wives?"
"But, he's so… I mean, I know his parents, Julie."
"I don't think Mark is the kind of boy who would talk, are you, Mark?"
He shook his head vigorously.
"Mark has admired me for a long time," Julie explained to Barbara. "I wasn't aware of it until I came home this summer. He and I had a nice drive and the poor boy was so excited. What was a girl to do? I couldn't let him suffer any longer, could I?"
Barbara looked at the nervous boy. For the first time, she saw him as a sexual person, not the boy she had watched grow up with her son. "Mark," she said softly, "you won't let things go any further than this house, will you? You won't let your parents know about… about us?"
"Gosh, no, Mrs. Kramer!" Mark said. "I couldn't tell on you."
"How would you like to fuck my mother?" Kenney said boldly.
"Kenney!" Barbara gasped, crimson.
Julie laughed. "Oh, come on, mother. Don't be bashful. You know what Mark told me just the other day? He said you had a pretty ass. He likes to look at you when you wear shorts. Didn't you tell me that, Mark?"
The boy nodded his head, looking at Barbara from lowered eyes.
Barbara studied the boy for a long moment, then a grin spread over her face. "You really like my body, Mark? Do you really think I have a pretty ass?"
Mark nodded his head again, even more vigorously.
Kenney giggled. "You want to fuck her, Mark?"
"Kenney, you stop that this minute!" Barbara said. "Don't tease the boy. You aren't my pimp, you know. If he wants a piece of my ass, he'll ask for it. I'm sure he doesn't need any encouragement from you."
"Aw, Mom," Kenney said, shuffling his feet about.
"Mark," Barbara smiled warmly at the young boy, "would you enjoy fucking me?"
"Gosh, Mrs. Kramer!"
"Would you?"
"Oh, yes!"
Barbara laughed huskily as she stood up from the table. She stepped close to Mark, peering down into his eyes. "Yes, I think you would," she said softly. Boldly, she stroked his cock concealed beneath his jeans. "Why, you're getting a hard-on now! How marvelous!"
Mark stood nervously as Barbara unzipped his jeans and pulled his swelling prick free. She glanced down at it, exclaiming over it. She stroked her tight fist back and forth, then lifted her dress and took his hand, placing it between her warm thighs. "Feel me, Mark. Feel my pussy. Isn't it nice and hot? We're going to have a lot of fun this summer, we are-. You and I and Kenney and Julie. We're going to fuck and suck and really have a ball."
"Starting right now," Julie said, getting up. "Come on, the last one in the bedroom has to suck assholes!"
They raced to the master bedroom laughing and teasing one another. Mark had lost his shyness now, and he was groping for the asses of Barbara and Julie, meeting the hands of Kenney. All four hurriedly undressed, then Barbara said: "I've got to shower. I stink after all day in the office. I'll make it a fast one."
Julie and the two boys, naked, crawled onto her bed. As the sound of the shower came to them, Julie kept the boys in a constant arousal by sucking first one cock, then the other. Their hands were everywhere on her naked body, feeling and poking.
When Barbara padded naked from the bathroom, she stopped and gazed at the scene on the bed. Mark was sprawled on his back, with Julie on her hands and knees, sucking furiously at his upstanding cock. Behind her was Kenney, on his knees, sliding his cock in and out of Julie's asshole.
"Hey, wait for me!" Barbara laughed, rushing to the bed. "Move your cocksucking mouth, Julie! I want that prick up my cunt!"
Julie sucked up and away from Mark's cock, grinning at her mother. "There it is, mother, nice and hard and wet for you."
Barbara squatted on Mark's cock, reached below and fitted it neatly into her steaming pussy. Mark's eyes bulged as he saw his prick slither up that hairy slit. "Now, you're in me, Mark. Hump your little ass! Fuck me, fuck me good!"
She wiggled and twisted her crotch up and down on him. She leaned slightly and placed her hand on Julie's ass-cheek peering at Kenney's cock thrusting like a pile driver in and out of the pink, tight asshole. "Pour it to her, Kenney! Fuck her asshole… rip her a new asshole! Ahhhh, fuck… fuck me! Fuck Julie! Fuck everybody!"
Julie shoved her tongue down into Mark's mouth as he bounced his cock up and down into Barbara's searing pussy.
The excitement was so great, none of them lasted long. Orgasms erupted with gasps and pants of pleasure, and they fell among each other, legs and arms entwined, kissing and stroking and licking at heated flesh.
During a lull in the activities, Mark called home and asked for, and received, permission to spend the night with Kenney. Then arms and legs entwined again in wild, orgiastic fucking, sucking, grunting whimpering.
Julie with her tongue licking up and down the seeping slit of her mother's cunt while it squirmed on Kenney's cock, Julie's own pussy clutching at Mark's prick, knew it was going to be one hot summer.
She was a girl going down.
Everyone was going down-on everyone.