Sweetie Belle was sure this was a dream. It had to be. It wasn’t possible to feel this good while awake! Her own hoof her own hoof pressed so urgently between her legs. That tingle that had tormented her for so long, controlling her so utterly, now she had control of it! She didn’t even mind that Rarity was there next to her now. The little filly was purely intent on her groin, and the button she had in there, and the clenches that she was going to make happen all by herself.
Rarity had touched her at first, all too eager to do so in fact. Sweetie Belle’s sister had swept her up into the tenderest embrace, and just expertly stroked her nethers until Sweetie was singing with pleasure. She started to get scared then, because Rarity wasn’t the dream princess, but she was still touching Sweetie Belle, and Sweetie couldn’t stop her sister even if she wanted. It wasn’t a bad time but she... kind of freaked out and tried to make Rarity stop. And unlike the dream princess, her sister stopped, and was very understanding, and started teaching Sweetie Belle about how to touch herself.
It was awkward at first, but after Sweetie really got into it she was a lot more confident when it was her hoof doing the touching. Ironically it made her sister less confident though, hovering by the masturbating little filly on the bed they were laying in, trying to offer tips that Sweetie Belle was trying to learn from, but was really too distracted by the absolute need to orgasm that welled up in her, turning her touching from hesitant and shy, to bold and desperate.
“Now easy, Swee—” Rarity cut off looking at Sweetie Belle thoughtfully, then shaking her head, “No, you look like you rather need this roughly. But for the love of Celestia don’t use your nail so much!” Sweetie wanted to pay attention, but she also wanted it to happen, and just had to focus on that above all else. She’d never felt so naked in front of her sister then when she was touching her bottom now, but the more pleasure she felt, the less she felt like she could care about whether her sister approved or not. Rarity was making a point not to touch her, letting Sweetie do everything on her own. Even Sweetie’s body was perfect for doing this, because the embarassing leaking that happened down there just made her more slippery and soft and that just made it feel better and better! She stared at her sister through half lidded eyes, breathing hard and not caring that her posture was hunched over, only that singular driving need that she had to accomplish.
Sweetie couldn’t stop staring at her sister’s bottom place. Rarity had only a teasing hoof down there, gently swiping in slow circles facing away from her so that Sweetie couldn’t see. Sweetie couldn’t help but make the connection, between her own bottom and her sister’s. Rarity knew what an orgasm was, and that means Rarity has felt that way before, and that means Rarity’s bottom was squeezing and she wanted to cry out and Sweetie wasn’t the only one and...!
Rarity seemed to notice Sweetie’s dumbstruck gaze, and ceased pleasuring herself, but not out of shame, rather with a sly smile. Her hips, her beautiful hips swayed in a way that just made Sweetie want her, like Sweetie’s bottom was hungry for Rarity’s, and Rarity was just fanning the flames. Her sister was doing that on purpose! She wanted this! Her own best sister saw Sweetie, lost in this intense, crazy pleasure thing, and she wanted Sweetie to be unable to look away, and to imagine both of their bottoms clenching, and hugging and something. Sweetie teetered on the edge of what might be the most difficult yet most satisfying orgasm she’d ever had, when the reason her sister stopped masturbating became apparant. It left Rarity free to swivel her hips around, her rear end solidly facing Sweetie Belle. Rarity’s tail was stiff in the air, just like Sweetie’s had been in that dream, and Rarity reached a hoof back there, to the fleshy wrinkled slit on her bottom. Not the butt, but another hole, one that felt so good to rub on.
And Rarity spread her own dripping nether lips, saying in a tone somehow both passionate and lecturing, “See, Sweetie? We both feel this way. This is what you have between your legs. This is what you can... do.” Rarity’s insides swelled and receded in a strong wink that briefly exposed the gleaming button that made Sweetie’s nerves catch on fire. Because Rarity had one too, and Sweetie had... the same...!
Sweetie winked.
She was trying to scream but she could barely half cry out as her body jerked up in the air with gasping breaths torn from her struggling lungs. That magic button mashed against her slimy hoof and that was it for Sweetie. Sweetie tore her hoof away, but she couldn’t stop it. It was going all on its own now! Little high pitched yelps escaped her as she clenched again, and again, and each one accompanied by a wave of intense electric pleasure that made her whole body arch up. And... and Rarity spun around and touched Sweetie then, touched her all over, picking up the convulsing filly in her forehooves and hugging her to her breast. “There, there,” Rarity said consolingly, “Just let it happen. You’re doing great Sweetie.” Sweetie was... so glad to be alive right now. Her bottom stopped clenching and tingling, and her legs slowly relaxed. Then her body, and her neck, and soon Sweetie Belle was just relaxing bonelessly against her sister. She didn’t even realize when she had passed from the waking realm to the dreaming there in her sister’s warm embrace.