After dinner Pinkie made Limestone clean up everyone's dishes again, she did it with only a little bit of grumbling. After Limestone finished, she asked if she could go, but pinkie thought of a new idea. What Limestone needed was to spend more personal time with ponies, and what was more personal than a sleepover!

“Limestone I have an idea, tonight you're going to sleep with me!.”

“What, why?” Limestone said with a confused look.

“You need to learn to deal with ponies better, think of it like a sleepover!” Pinkie said cheerfully.

“Fine but I don't like it.” Limestone grumbled.

Pinkie spent the rest of the night hanging out with Limestone, talking and trying to have fun with her.

Later that night after Pinkie and Limestone had gone to bed, Limestone was still up. It was the middle of the night and she could feel Pinkies cock poking her in the butt, all she could think about was when Pinkie had fucked her throat that morning. She could feel herself getting wet from the thought, her pussy started to leak a bit, and was absorbed into her panties. Just the thought of that strong dick rubbing up against her was amazing. She double checked that Pinkie was asleep before she pushed her hand down her pants, and started feeling up her pussy. She rubbed the outside through her panties, toying with herself, and rubbing her crotch. After a while she slipped her hand inside the panties, and started inserting 2 fingers into her pussy. As she pushed her fingers rubbed and flexed inside her moist tunnel, slowly massaging her sensitive insides. Limestone knew Pinkie was a heavy sleeper, so she started to rub her butt against her cock just a bit.

She kept rubbing for a while, but it wasn't enough, and she started pulling down her pajamas and panties. Pulling them down let her better finger herself, and also rub her bare ass against Pinkies covered erection.. As she rubbed though she started to feel Pinkies pajamas shift a bt, until suddenly her thick cock popped free and poked between Limestones legs.. She could feel the warm, hard cock now pressing against her dripping cunt, and could feel as it throbbed from the blood pumping into it. Limestone pulled her fingers out of her cunt, dripping her juices on the shaft, and grabbed onto it. Slowly she started to thrust and grind her pussy against Pinkie shaft, thinking about what it had done to her this morning. She started rubbing faster and faster along Pinkies cock, until she felt her orgasm start to build. Clenching her legs around the shaft, she shook as she came from rubbing against it.

Limestone laid for while catching her breath, thinking about how her sister had already given her two orgasms with that cock of hers. After she caught her breath Limestone started pushing herself away from Pinkie to get her cock from between her legs, but when the tip was pressed against her pussy she felt Pinkie grab her hips. Looking back she saw Pinkie was still asleep, not reacting at all to Limestone looking at her. Limestone started to pull away but Pinkie wouldn't let go. She didn't want to wake her but her shaft was rubbing and pushing against her slit, slightly parting it when she would get pulled back on it. Suddenly Pinkie pulled back, impaling Limestone on her cock.

Her pussy was stretched by the cock forcing its way into her tight tunnel, but it was only able to impale her on 4 inches before it stopped. Opening her mouth in surprise, then closing it as she shuddered from the feeling of being so full. Pinkie moved her hips a bit and mumbled in her sleep, but otherwise didn’t respond to impaling her sister. Limestone started moving the cock out of her, but when only the tip was still in, Pinkies hands pulled her down on it again, pushing her cock a little bit deeper than before. Limestone laid there as it pushed further in, when it stopped again the still sleeping Pinkie started moving her hips, slowly thrusting her cock in and out of her sister. Pinkies cock rubbed along the inside of Limestones pussy, the pleasure from it making her stop trying to get free. Laying there her pussy squeezed and gripped Pinkies cock, begging for her to move faster.

As Limestone laid there, panting and moaning slightly as her sister used her, she thought of what was happening. Pinkie had just grabbed her and started fucking her without a care of how she felt, and the thought of being used made her even hornier. Reaching down she started to rub on her clit as her sister basically raped her while asleep. She loved the feeling of having no choice in what was happening, her body used as a plaything to get off. Pinkie kept thrusting a little deeper with every thrust, and she could feel it pushing deeper in, trying to breed her. Finally Limestone pushed herself over the edge, her pussy clenching down on Pinkies cock, and her tongue falling out as Pinkie kept fucking her through her orgasm.

Pinkie kept fucking Limestone for the next few minutes, when Limestones second orgasm hit and her pussy started clenching hard again, Pinkie came too, her flare expanding, keeping her cum from flowing out. Pinkie pushed the orgasming Limestone as far down her cock as she could, then started cumming deep inside her. When Limestone felt the first spurt of hot cum entering her, her mind went into overdrive. She felt her mind cloud as her thoughts turned depraved, all she was right now was a sex toy to her sister's cock, a hole to dump her cum into. Her hands started groping her tits, and pinching her nipples as she started thinking of Pinkie using her, even abusing her. These thoughts shot into a third orgasm, as Pinkie kept pumping her cum into her. The feeling of thick hot cum filling her was amazing, she loved everything about this. Once Pinkie finished cumming she let go of Limestones hips and let go, but she didn't try to move. Limestone just laid there with Pinkies cock still lodged inside her as she started to drift off. Thinking that thankfully nothing would happen from her cumming inside, all 3 sisters were on birth control. No matter how much of, or how potent her cum was, Pinkie wouldn't be able to get any of them pregnant.

Right before she fell asleep Pinkie grabbed her hips again and started pounding her pussy. When she looked back she saw that Pinkie was still asleep, and as she was getting rammed again she decided she would ask Pinkie if she could sleep with her some other night. She could be Pinkies own personal cock sock, and her thoughts turned lewd again, she was a futa cock sleeve, her only purpose to be fucked and filled with futa cum. Limestone started thinking of fantasies where pinkie would use her like a toy, make her suck her cock at dinner under the table, rip off her shorts and fuck her anytime, and anywhere she wanted. Make her have sex in front of her sisters while they laughed at her, call her a futa fuck hole. Her mind went wild with fantasies, she wanted Pinkie to dominate her and do whatever she wanted, use her body however she wanted. Riding another orgasm when Pinkie came again, filling her even further.

When Limestone fell asleep that night her cunt was filled with futa cock, and thick cum. She couldn't be any happier.

Author's Note

As usual, mention any problems, and thanks for reading.