Me and my sister Celest grew up together for most of our lives. Technically, she was my step-sister, but we lived together for so long that I often forgot that fact. We always got along well and played games together. Some were typical, like hide and seek, but others… were different.

 

“Hey, would you let me tie you up for one last game, Miki?” My sister asked while we were watching TV in my room. “You know, for old times’ sake.”

 

“Umm, sure?” I was going off to college this year, so these next few days were that last time we would get to see each other for a while, but why did she wanted to tie me up? “What kind of game is it?” I ask.

 

“Oh, it’s just a little, good guy, bad guy, type of game. I just have to interrogate you and you get to tell me information or make up lies and I have to guess what’s true.”

 

I was still a little nervous, but it seemed a little fun to be so vulnerable, and honestly, I could never say no to her, so I went along with it.

 

First she got me to lie down on the bed and then she grabbed a few shirts from my closet and used them to tie my hands and legs to the bedposts. Once she had me tied to the bed, she sat next to me on the bed and asked questions.

 

“Hmm, let’s see. Do you have a crush on anyone?” she asks, trying to think of something embarrassing.

 

“Nope!” I just smile and lie to her, seeing if she could tell.

 

She just moves her head slightly sideways as if she’s trying to read my expression.

 

“Hmm, I don’t think that’s true!” Moving down towards my feet, she removes my sock and tickles them. “Are you sure you don’t have a crush on anyone?”

 

The tickling felt strange but wasn’t really too bad, so I just shake my head no and laugh at her.

 

“Hmmm, ok well. I still don’t believe you. Let’s really find out,” she says, moving back up to my midsection. Then he reaches between my legs and flicks me in the testicles! I was only wearing tight shorts, so my balls were completely exposed!

 

“Ah!” The pain surprised me, and my sister simply giggled.

 

“Well, do you have a crush?” she asks again, flicking my balls a two more times before stopping to look at me

 

“Stop flicking my balls! That really hurts!” I cry out as the pain starts to really build up. My testicles were pretty big and i knew they were sensitive, but it still surprised me that even just having my balls flicked could hurt so much.

 

“Aww, does it hurt when your little sister flicks your big balllsies? Well, answer me silly. Otherwise, I’ll keep hitting you in the truth buttons!” she says before quickly flicking my balls three more times.

 

“Ok, ok! Yes, I have a crush!” I yell out “Please stop! Flicking my balls really hurts Celest!” I’m trying to be serious, but my sister just laughs at me

 

“Oh, don’t be so dramatic, it’s only a flick,” she says, reaching over and flicking them one more time.

 

God, my balls hurt so much. How can she cause me so much pain and just laugh? Having her tie me up might have been a terrible idea.

 

“Next question, who do you have a crush on?” She asked me. I really didn’t want her to hurt my balls again, so I quickly answered honestly.

 

“It’s Alison!” Alison was this really cute girl that I had met in school. We spoke a few times, and she was always so nice to me.

 

“Ooh, of course it’s Alison, she has such big boobies, I bet that’s why isn’t it!” she says, bringing her hand to her own large breasts and shaking them to mock me.

 

“No! She’s just nice to me.” I say defensively. I don’t know why it bothered me, but I didn’t like her saying that.

 

“I think that’s a… LIE! Let’s hit the truth buttons and find out!” she says and raises her hand into the air, then slamming it down on my balls with a lot more force than before.

 

“Oooh fuck…Celest…why my nuts everytime!” I cry out. The pain quickly becoming unbearable.

 

Celest just sneers and says “Because hitting them makes you tell the truth! Watch!” Then she brings her hand up in the air again.

 

“NO DONT! Yes, it’s because of her boobs! They’re so big and bounce when she moves… I can’t help it.”

 

I couldn’t believe I just said that to my sister, but the thought of her hitting my balls and inflicting that awful pain again was hard to imagine.

 

But then, I didn’t have to.

 

“I knew it! You’re a big pervert, aren’t you?” She says before bringing her hand down on my aching nuts, slapping them both perfectly.

 

“UGHH…. my… balls.” Is all I can say. Her repeated strikes on my jewels hurt more than anything I ever felt. I was trying to squirm out of the bindings that kept me tied in place, but she had me tied up too well.

 

“Wow! I only slapped you twice and you can hardly speak! Your testicles are really sensitive, but that’s why they make good buttons!.” Now my sister was just mocking me. She knew how much it hurt, but she enjoyed watching me in pain, I think.

 

“Please… Let me go Celest. My balls can’t take any more,” I beg her. My balls were so sore, and I really needed this to stop and take a break.

 

“Hmm, ok but one more question.” My sister says with an evil grin.

 

“Do you like…my boobs as well?”

 

Hearing her say that made my heart sink. I had always thought her boobs were amazing, but she was my step-sister! I hated to think like that.

 

Celest moves up and sits on my stomach, then she puts her hands on the bottom of her shirt and slowly lifts it off. With no bra underneath, her big breasts drop and bounce a few times before coming to a rest.

 

“Well, do you like them?” She says, now blushing a little as she leans over and puts them directly in front of my face, her pink nipples only a few millimeters away.

 

“Umm… I… I’m not…” I stutter. I didn’t know what to say. My sister’s boobs were the first ones I ever seen in real life, and they were so big and perky… I couldn’t think straight, and my mind was blank.

 

“Heh well, this time there’s an easy way to tell,” she says with a laugh, looking behind her and seeing my boner. For a second, she briefly lifts my shorts, inspecting my hard-on almost to ensure it really was my penis.

 

“But that’s very naughty. Your sisters’ boobies shouldn’t make you hard. This is my fault though isn’t it Miki, let me take care of it.

 

Slowly she slides down and sits between my legs and then brings one hand up my shorts.

 

“These are not only truth buttons you know, but they can also be off buttons. With a hard enough squeeze, I can get rid of all those naughty thoughts!”

 

All I can do is shake as I realize what she’s about to do.

 

“NO… no, no, please don’t squeeze my nuts!”

 

Celest sees me struggling and picks up her shirt off the bed, balls it up, and then stuffs it into my mouth.

 

“Celest… not my balls…. Anything but my balls…Please don- mmmmf”

 

“It’s ok Miki, this is going to hurt a lot but, I have to squeeze them. I can’t let my brother get an erection after seeing my boobs,” she says with a smile, bouncing her breasts to taunt me and also bringing my boner back fully.

 

“Ok, get ready Miki, let’s find out how hard I have to squeeze them!”

 

With her hand back inside my shorts, she locates my balls and gets a secure grip before she squeezes down on them.

 

“mmmffff… uuufff!” I try to yell out, but her shirt just drowns out all my cries.

 

“Shhh shhh, don’t worry, it’ll be over soon. I know your balls hurt. Just endure it for a second.” Celest says as she tightens her hand on my swollen balls. Her fingers are really compressing them brutally and the pain is overwhelming.

 

After 15 seconds of her squeezing my balls, she looks at my penis and notices I’m still not soft.

 

“Oh wow! Miki, you must really love my titties! Hopefully, your off buttons are not broken! You’re such a bad boy, but I’ll take care of this for you… Although this is probably going to be the worst pain in your life, so… try not to pass out, ok brother?”

 

Just hearing her say this stuff made me freak out, and I tried so hard to escape, but it was futile. Suddenly, I feel her squeezing way harder on my testicles, digging her fingers into them violently.

 

“It’s ok brother, I know it hurts but your balls are fine. You can enjoy boobies, just not mine~” she sings while inflicting the worst pain imaginable on my aching nuts. How can she be so casual?!

 

They felt like they could pop at any moment, and I felt a really nauseous feeling in my stomach as the pain surged through me. Waves of agony rolled over my body as my sister kept squeezing and crushimg my poor balls.

 

After an agonizing 30 seconds of Celest crushing my balls with all her strength, my boner finally went down. I had never been so happy to not be hard in my life!

 

“There we go! I knew they weren’t broken. I just needed to give your balls a really good squeeze.” She says while laughing and almost celebrating her ‘success.’

 

She gave my crotch one more hard slap, smacking my balls yet again, but also confirming my boner was gone. Then she untied me, and I instantly curled up into the fetal position to nurse my balls.

 

“Well, any time you want to play again, just let me know! I’m always willing to squeeze your buttons, Miki!”