A Threesome with Mom and Sis

This chapter originally written by CrossC, minor edits by Samus1001

"Strip down and get on the bed?" he managed, his terminally aroused mind only able to come up with one idea.

Caleb wasn't prepared for the short cry of excitement from his sister's lips nor the sly happy teasing glance she gave him as she reached for the hem of her t-shirt. But he couldn't pay any more attention to her as he felt his mom shift around on top of him, his ferociously erect shaft rubbing against her pelvis, "Great idea, Caleb. Let's get stretched together, mom and daughter. That's a bonding experience if I ever heard one. Oh! But I can't wait. I need you in me. Oh god!"

The tip of Caleb's dick was introduced to the hot wet clasp of her pussy as she descended. His hands came up to support her hips while her own palms braced on his chest as her heavy boobs hung off her chest, jiggling and swaying between her arms. She bit her lip and whimpered as every inch of his cock was abruptly swallowed up by her falling hips.

Caleb's cock was in heaven and he reached around to grasp her full ass, squeezing deeply and pulling at her cheeks as she started to ride him. "Oh god. Fuck. Ohmygod! Fu-uuk. Oh god. You're so big. I can feel you stretching me! Fuck. Oh god. Uhhh!” she began to sob over and over in apparent pleasure “My own son's stretching me!”

"How is it, mom? What's it like?" asked Hazel and Caleb's already wide eyes widened further as he watched his sister's nude body clamber up onto the bed beside them. She giggled, "I mean obviously it's good I can tell but what's it like being stretched?"

His mom sighed deeply as her hands massaged his torso and she sat heavily upon his pelvis, grinding a bit upon his shaft within her, "G-oood.....so good. It's like my va- my pussy's waking up!" she laughed as she rode him, "I'm already close to cumming and I can tell it's going to be a big one! With your da-"

Mom's face was red and she shook her head to focus on raising herself up on Caleb's shaft. He was pretty much out of it, simply enjoying the sensation of her hot cunt squeezing him as he delighted in fondling her heaving breasts above him.

"Oh come on!" scoffed Hazel, looking a bit awkward on the bed beside them as if she didn't know what to do, "You've got to tell me now!"

Mom pushed at Hazel's shoulder, "Oh fine. Your father's a good size but... well, he doesn't have a cunt-stretcher like your brother!"

"Mom!"

"What? You don't like my language, young lady? Well too bad. I usually only cum from your dad eating me out. Though now that I'm stretched I think that's going to change! Yes!" She repeatedly raised her hips and pounded back down, "God! I can feel you against my very womb! No man has reached this deeeep, baby! Oh god I'm going to cum!"

She rode him like a woman possessed, her hands clenching like claws and digging into his shoulders. He felt a hot spray of liquid across his stomach and chest. He could only groan and clench the muscles of his ass as he fought the urge to ejaculate. It had only been a couple of minutes after all and in front of both his mother and sister he didn't want to look bad. His mom soon collapsed atop of him, heaving. "Go-awd! Y-you made me squirt! I've never! Oh!"

Soon enough she was slipping off of him and to the side. He groaned and writhed a bit as she took his member in hand stroking it. "Are you close, baby? Or can you go longer? I don't want you cumming inside of your sister." She gripped him tightly about the base as she motioned Hazel over. "I have some condoms but they're too small definitely. You've got a fat cock, too. Perfect for stretching, baby, oh my god was it. Well, once she's stretched she'll cum quick. Then I can ride you again. Mommy's on birth control. Okay. Ready sweetie?"

Hazel took a deep breath as she held herself awkwardly over Caleb, her bottom strangely in her mother's hand as her brother's cock head was pressed to her weeping slit by her other. "Okay? Just drop down all in one go. Let that big dick make room inside you. That's the way..."

His cockhead nudged against her lips and easily punctured her thanks to how wet she was. There was the slightest of obstructions inside but he burst through with a sharp cry from his sister. And then it was just one, long, smooth push until he bumped against her cervix.

Mom's hand was caressing Hazel's navel, "Losing both your cherries at once? I'm jealous. Nothing but great sex from the get go. You should thank your brother. Your big brother...hehe"

"Th-thank you, C-caleb! Oh! Oh god! You're right, mom. I can feel the difference already! My whole pussy is tingling and alive! Wow!"

Hazel's movements are tentative as she gently rode him. Caleb could see some drops of red at the pussy lips splayed around the base of his cock. He is struck dumb at the thought that he'd taken his own sister's virginity. He also wasn't sure what to make of their comments, only vaguely able to remember the stupid stuff he'd said would happen when a big cock stretched a pussy. Hazel rode him with increasing passion and activity, all the while their mom softly rubbed their bodies and watched with an easy smile. It wasn't long at all before his sister was calling out in much the same way mom had that she was cumming, screaming out. This time he saw the jet of juices fire from the top of her slit as it beat upon his navel repeatedly, coating his stomach.

"Oh there you go, honey! There's a stretched pussy cumming! Yes!" cried his mom and that was too much for Caleb. This was too erotic on top of the incredible sensations on his cock.

He groaned, "Ungggg! I'm going to-"

His mom practically grabbed and jerked Hazel off of him and he was soon groaning unintelligibly as she took his prick in her hand and stroked it rapidly. He came mightily all over his torso as his mom and sister watched. Mom kept up her hand's quick movements as he ejaculated and Hazel laughed excitedly as she stared at his steadily spattered abdomen and chest, some even got on his neck and chin. His mom even stroked the discharging head with her thumb and the tantalizing sensation had him squirming twisting his face in a ridiculous grin. As his orgasm subsided, his mom relented her stroking and laid his softening member down upon his sticky navel.

"Wow, quite a bit." she mused as she looked at her soiled hand. A smirk twisted her lips as she looked at her son and daughter, "I think you came more in that first shot than your dad's entire load. On his best day! Wow!"

"Mom! I'm so telling dad you're making fun of him." said Hazel as she sighed deeply and fell upon the bed pressing right up against Caleb.

"Uh huh. Your brother likes it. A mother can tell." remarked mom before she pushed up off the bed, "Now I've got to go do that bit of shopping." She bent over to pick up her dress and apron, wiggling her big naked bottom provocatively as she did so. "Do you need anything, baby? I'm going to pick up some condoms the right size and some lube. You need to get on birth control, young lady. But that can wait for another day..."

Caleb was slowly regaining his mental facilities and he found himself once again marveling at the way the people in his life simply took these monumental events as simply par for the course. "Uh...yea, mom. Could you pick me up some beer and pull a couple thousand out of the bank for me?"

As she put her clothes on, mom didn't even bat an eye at his two demands that would have been seen as poor jokes before the watch, "Sure, honey." She smiled at him, her eyes twinkling, "Are you making your own mother pay you for sex?"