"Not so hard. Not so hard. Yeah, Mmm, that's it. Slow and steady." Jen's breathing became deep and rhythmic as her brother, Jon, diddled her twat. "Do you remember the first time?"

"Yeah. I called you Fister Sister cuz you had your whole hand up there," Jon chuckled, remembering back when they were seventeen.

"Fuck you! It was only three fingers!"

"Bullshit! You hand half your hand stuffed in your twat. If I hadn't walked in, you would have had the whole thing up there," he snorted.

Years earlier.

Jon walked past her bedroom door one afternoon and heard her moan. The sound of it was odd enough that it stopped him in his tracks. His first instinct was that she was sick or had passed out, anything but what he walked in on. His naked twin sister was kneeling over a bath towel that she had spread out beneath her. Her breasts were swaying from her chest as she worked her hand in and out of her vagina. Porn was streaming on her laptop while a bottle of lube that had tipped onto its side, dribbled lubricant onto the throw rug.

Jon was already in the room before she noticed him. "Shut the fuckin door," she screeched. He was so startled by her command that he slammed the door, closing himself inside. "I said, get out!"

"You said, 'Shut the fucking door!' It's not the same thing," he replied smugly. "I would have never guessed that I had a sister who was a fister. Fister Sister!" Jon chuckled.

Jen sat back, covering herself with the towel, saying, "I wasn't fisting, I was having trouble... getting there."

"Ahh, the elusive orgasm. Your problem is the angle. You need to come in from this angle," Jon's animated gestures made her giggle. "I'm sorry that I walked in. I thought something was wrong. I'll leave you to it, then."

"Or... you could stay and help? We could," Jen hesitated to finish her sentence.

"Each other? That's a hard no. I don't want anything stuffed inside me."

"You know what I mean. You do me, and I'll do you. I'll even suck your cock," Jen said, dropping her towel, trying to sweeten the pot.

His sister's proposition piqued his curiosity enough to get his cock's attention, which she was quick to notice. Jen reached for his waistband and pulled his shorts and underwear down to expose his rapidly growing cock. "Do you want to come out and play?" Jen giggled, kissing the tip. She closed her lips around the head of his cock and flicked her tongue around its head, making his penis swell in her mouth.

Jen sucked it into her mouth a few times before telling him to get on his back. She knelt next to his shoulder and bent over to suck his cock. She threw her leg over his head, lowering her pussy to his mouth while she continued to suck his cock.

Jon grabbed her tits, tweaking her nipples as they sixty-nined. The added sensation quickly made her cum. Moments later, he unloaded his nuts into her mouth, which she happily gulped down. Jon knew that she was far from finished, so he rolled her off of him, continuing to lick her pussy. He inserted his finger, pumping it into her vagina while he rubbed her clit with his thumb.

He pumped his finger in and out of her, occasionally pulling out to add another finger until he had his hand buried up to his thumb inside his sister's cunt. He felt her tense and hump against his hand as he dug around. Realizing that he'd found her G-spot, he rubbed it rhythmically while thumbing her clitoris. Jen bucked her hips as a wave of orgasm surged through her. She pulled his cock out of her mouth, gasping, "More!"

Jon pressed his thumb into the palm of his hand, trying to squeeze it into her as well. Jen's hungry eyes yearned for more. She grabbed the bottle of lube, squirting it onto her pussy, lubing it for his exposed hand. She then took his wrist, slowly guiding his hand in. Once it was in, she told him to move it slowly until she got used to it.

Jon did as she said, moving his hand in a steady, purposeful motion. He'd rub his fingers across her G-spot every time they were close to it. He saw her eyes roll white as pleasure washed over her. "Faster," she said breathily. Jon picked up the pace, eager to please her. He wanted to make her cum as hard as he could, so he leaned in and licked her clit as best as he could.

Jen thrashed about, pushing her brother's hand out of her just as she squirted. She clamped her hand over her pussy, rubbing her clit in a flurry of fingers, causing another gush to escape from her hole, soaking the towel. Her body twitched and spasmed, rocked by a series of climaxes.

Jen had never felt so satisfied, but greedily craved more, and motioned for him to put his hand back inside of her.

Jon begged her to let him fuck her while he continued to fist her. After he had made her cum multiple times, she finally said yes. He told her to get on her hands and knees so he could fuck her doggy style. Her pussy was so loose it felt like he was fucking a bucket. He looked down between them to see her sopping wet cunt loose around his cock.

This wasn't going to do. Jen's sloppy slit was so slick he could barely feel it. Jon pinched her pussy lips together in an attempt to tighten her slut hole. As he shifted behind her, his knee squished a latex dildo that had been hidden in the towel. Jon took it and stuffed it in his sister's cunt along with his cock. The addition of the plastic pecker tightened her twat, heightening the pleasure for both.

For Jen, the sensation of having two penises pumping into her was enough to make her squirt, drenching her brother's balls. Hearing her moans of ecstasy was the added push to bring Jon off as well. He pumped her cunt full of creamy cum. Both collapsed in a heap at the side of her bed.

Now, years later, they regularly make the trek home from college so they can get together to fuck away a weekend.