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Shizuku softly pushed Shiho onto the bed, fingering her pussy. "Why didn't you tell me you were in heat before now? You could've already had babies in you~" Shizuku purred, her fingers picking up the pace. Shiho's moans became slightly louder as pleasure surged through her body "Shiho~ You're a very bad girl for not telling your big sister you were in heat~"
Shizuku removed her fingers causing Shiho to whimper. Before Shiho could say anything, Shizuku covered her mouth and whispers softly, "You're such a pretty puppy, I bet you're litter is gonna be even prettier~" Shizuku grabbed a pair of handcuffs and put Shiho's wrists in them.
"H-hey! What do you think your doing!" Shiho yelped as the handcuffs clicked and Shizuku put the key on nightstand. Shizuku pulled down Shiho's pants revealing a pair of black lacey panties. "Stop it Shizuku! This isn't funny!"
Shizuku giggled softly, "Aww, Shiho, you're such a cute puppy! You begging me to stop is adorable!" Shizuku grabbed a ball gag in Shiho's mouth and strapped it on securely, "Though, I do need you quiet so our parents didn't hear us~" Shiho's ears lowered and she softly whimpered in fear making Shizuku giggle. "Shhh, puppy~ I'm not going hurt you sweetheart~" Shizuku whispered as she removed Shiho's top and bra.
Shizuku giggled and licked Shiho's nipple causing her to shiver. Shizuku started suckled on Shiho's left boob causing Shiho to squirm and groan into the gag. Shizuku started sucking hard on Shiho's boob causing Shiho to subconsciously thrust her hips up, grazing Shizuku's crotch,and moan louder. "Oh, seems like the pretty puppy enjoyed that~"
Shizuku turned her attention to Shiho's crotch. She softly rubbed her fingers against Shiho's clothed clit causing Shiho to tense up and let out a series of small moans. Shizuku stopped and moved her hands up making Shiho whimper and softly buck her hips. "Aww, such a horny puppy, don't worry, you'll get a treat soon~"
Shizuku forcefully removed Shiho's panties, Shiho shivered due to her wet clit being exposed to air. Shizuku giggled and kneeled down, using her hands to keep Shiho's thighs open. Shizuku lowers her head and forces her tongue between Shiho's wet folds. Shiho gasps but soon starts to moan loudly as Shizuku starts eating her out. Shizuku's tongue thrusted in and out of Shiho rapidly.
Shiho's eyes starts to tear up as her sister ate her out. Her moans, despite being muffled by the gag, easily covered up the sounds of Shizuku's tongue thrusting in and out of Shiho's pussy. Within an instant, Shiho's back arched as she reached her climax, cum covering Shizuku's face. Shiho's tail started wagging from the pleasure if her orgasm.
Shizuku simply giggled and happily liked up the mess before pulling up. "God, you taste amazing~ I'm so lucky to have a little sister who tastes so amazing~" Shizuku proceeds to remover her panties and throw them to the side. She crawled up to Shiho's face and removed the gag from her mouth.
Before Shiho could say anything, Shizuku forced her wet clit onto Shiho's mouth. Shiho looked up at her sister in shock causing Shizuku to laugh, "What, you really think I'd give you pleasure without wanting some myself?~" Shizuku grabbed the back of Shiho's head and pushed it more into her cunt, softly grinding against Shiho's lips.
Shiho eventually caved, her mine still fuzzy from her orgasm, and softly licked her big sister's folds. Shizuku stiffed up and moaned softly, gripping the headboard to steady herself. Seeing this, Shiho quicker her tongues movements. Shizuku's desperate moans and gasps of pleasure only got louder, her back arching. Shiho didn't have to wait long before Shizuku came in her mouth.
Shizuku softly panted and getting off Shiho's face, instead choosing to cuddle up to her, "Y-youre such a good little sister, always k-knowing how to bring your big sister pleasure!" Shizuku kissed Shiho's ears softly. "F-fuck you, just remove the handcuffs..." Shiho panted softly, hiding her face in Shizuku's boobs. Despite how much Shiho hated it, she couldn't deny that Shizuku helped her heat feel better.