My step-sister Annie kicks my balls

My step-sister Annie kicks my balls!

By BallbustingFanatic

My sister Annie and I have both been working from home this summer, Annie has an internship where she can work from anywhere, and I've been doing a research project for one of my college professors that keeps me home and on the computer most days. Our parents both work, so it's usually just the two of us at home during the day. 

Annie has always been… hot. My friends often joke that she must have a different father than me. I just laugh it off, but I have to admit that she looks good, even to me, her younger brother. 

She only wears panties and a tank top when she works at home… usually skipping the bra, and she looks amazing. Her breasts fill out the tank top nicely. I swear they must have grown since she got the top, since her boobs stick out of the sides quite a bit… and god… they swing and jiggle as she walks, it's impossible not to stare.

As usual, I stopped in her room while on my break today and seen sitting on her bed working on her computer. She was leaning just far forward enough to give me an amazing view of her perfect cleavage! Annie has long blonde hair, an insanely cute face, and porcelain skin. Her breasts were surprisingly big, and really just perfect, and as I peered down her top, I could just see her perfectly pink puffy nipples…. Fucking awesome.

"Look at these cute tank tops! I have to try them all on!" she said excitedly as she ripped into packages that I just picked up from outside. She showed me a couple. I wanted to see all of them on her, thin fabric and some were REALLY low cut.

"You'll have to show me the best ones," I said, trying to sound innocent.

"Yeah, I'll wear the best one at lunch," she said. "Hey, I better get back to work now. See you later."

I left her room and went back to mine, as I had a ton of work to finish myself. After a while of coding, I snapped out of the zone I was in and was surprised to look up and see it was nearly lunchtime. I headed out of my room to see what we might have in the kitchen. On the way I went by Annie's room, her door was partway open. She stood in front of her mirror, admiring herself in one of her new tank tops. God… She looked hot, I mean, really hot.

I stood outside her doorway and couldn’t help but stare, as the outline of her breasts through the thin tank top was mesmerizing. Then she suddenly whipped the shirt off over her head, allowing her large breasts to pop out and bounce around before settling naturally. 

She walked back over to her bed topless, and she picked up the pile of shirts and looked at them. She held one up, then the other… god… her tits had me completely hypnotized. I looked down at my shorts and my cock was hard, pushing up against the fabric and straining to get out.

She pulled on a white tank top, then stood in front of her mirror and started to dance! With each movement, her breasts bounced, making the gorgeous sight even better! I couldn't help it… I reached down and put my hand on my cook, slowly stroking it. It seemed like time stopped, and all I wanted was to bury my face between those breasts.

Then she pulled her tank top off over her head and my eyes widened as I watched her boobs bounce and jiggle as they tumbled from her top… GOD, what a perfect set of tits. She looked in the mirror and cupped her breasts in her hands, then she danced around the room again, this time topless. Her breasts swayed hypnotically as I stared at her from behind her door… fuck; she was stunning. But then she stopped suddenly.

"Matt?! What the fuck are you doing?"

Holy shit, it didn't occur to me that she might see me as she moved around the room. What a fucking moron!

"Uh, I was just walking by on my way to the kitchen…. I s-saw you dancing, and I didn't want to interrupt," I answered quickly.

She looked at my shorts and seen my boner sticking out like a tent…

"No, I heard you walking by a minute ago. It's pretty obvious that you've been watching me. You pervert!" she said. She walked towards me, only stopping right in front of me. 

"You shouldn't have done that!" she said.

As she spoke, she drew her leg back and then shoot her foot forward, and blasted it up into my balls HARD. She caught me completely off guard and fucking smashed both my testicles brutally. I tried to breathe, but couldn't get any air. The pain exploded through me as I looked at her and I felt my legs give out from underneath me. I crumpled to the floor in agony, unable to process that… that… she just flattened my balls!

“Oooooh FUCK Annie!! MY balls! You just kicked my balls!!” I howled, the surprise pain just flooded every inch of my body!

"You fucker!" she said.

I was lying on my back and my legs must have been just far enough apart for her to get her foot between them. She nailed me again.

"OOOOOF!" I moaned. “OH! NOO… NGHHHHHHH,”

"And you still have a fucking hard on!" she said as she tried to kick me again as I got both hands on my balls, I curled up and covered up.

"Stop, Annie, stop! Not my nuts!!" I moaned. She stood over me, looking down in anger.

"No Matt, I'm not done with them yet. GET UP!"

I couldn't do it. I rolled onto my hands and knees, but I was still curled up and I was still protecting my balls in case she blasted my aching balls again.

"GET UP NOW!"

"O-okay, I'm trying," I stammered. I held onto the door and pulled myself up. She was still topless and even in agony I had to admire her breasts, just fucking perfect.

"You have the balls to stare at my tits still?" she said, looking at me with disdain. "Fucking pervert."

I was afraid she was going to kick me again, and my nuts already hurt so fucking much… I was holding my cock and balls with one hand, the other was on the door, helping me stand.

"You've seen my tits, take off your shorts, Matt," she said.

I didn't move, I just looked at her, confused.

"Do it now, or you'll get kick you right in your fucking nuts again," she said.

"Okay," I groaned, I didn't know what else to do! She was in charge now… I pulled my shorts down, my cock popped up as I pulled them down. She looked at my erection, my cock was pointing at her.

"I just can't fucking believe you, standing there with an erection while you peep on your sister," she said while I struggled to stay standing.

"You look amazing, Annie! I'm sorry I was watching you, but you are really beautiful!"

I really meant it, and I wasn't just trying to calm her down. I managed to stand up straight. I tried to hold on to some shred of dignity.

"That's nice, Matt, I'm glad you enjoyed my tits… but this is not acceptable, and your balls are going to pay for it!" she said, and before I could even move, her foot shot up again, straight into both my bare balls again, crushing them violently into my torso. 

“FUCK! MY NUTS, NOT MY NUTS OOOOH FUCK, WHY DO YOU KEEP KICKING MY NUTS!!” I cried out as I dropped to the floor again, the pain gripping me all over in its terrible embrace as I kick my legs to do anything to ease the agony!

"Because they're easy to hurt, and as long as I aim for your nuts, I'll always be able to make you regret it!" she slammed the door on me and went back into her room. 

I lay on the floor outside her door for a few minutes, just trying to recover. God, she was right, my balls were easy to hurt… and still she kicked them so hard, anyway! Once I was able, I made my way crawling down the hall to the bathroom. I locked the door and put on the light so I could check my balls. I sat on the edge of the toilet and felt around them. They seemed to still be intact, but they were sore as fuck. My cock was still hard. Really hard. For some reason, getting kicked in the balls by my own sister had me really… excited.

There was something about it. She was my sister, beautiful and sweet, and yet, she hit me… there; she kicked me as hard as she could in my testicles! Over and over, aiming right for my most sensitive spot, slamming her dainty little foot into my sexual organs and causing so much brutal pain… a pain she’ll never even know.

I couldn't help myself! After I was done checking my balls, I took my cock in my hand and squeezed it. I almost let out a moan. I was so close to cumming, the pain in my balls mixed with the pleasure of my hand on my cock.

My mind was filled with the image of Annie naked, dancing around her room, her breasts swinging. I couldn't get the image out of my head. I didn't want to jerk off, but I was already so far down that path there was no turning around. I spun around and pointed my cock into the toilet. In just a few strokes, my cock erupted. I blasted cum into the toilet.

"OH FUCK!" I moaned, much louder than I wanted to… I hoped Annie didn't hear me, but it felt so fucking good. 

"OHHHHHH! FUCK!" More and more cum splashing into the toilet. It was getting ridiculous! I thought I might fill the toilet. What an incredible orgasm, what the fuck was going on. It seemed like my brain had short-circuited.

I sat in the bathroom for a long time as, honestly, I was scared to come out. Through the door, I heard Annie head downstairs for lunch, so I slinked back to my room. I lay on my bed with my balls aching and I just hid out for the rest of the afternoon.

Annie came by my room in the late afternoon and, for whatever reason, she brought me a banana to eat.

"You haven't left your room all afternoon. Are you okay?" she asked.

“I'm okay, they’re just… sore…”

"Hehe… about that, sorry I got so mad. I probably shouldn’t be kicking my own brother in the nuts THAT hard, especially that last one! I actually felt them get squished!" She couldn’t help but giggle despite trying to apologize. 

"It's okay, I deserved it," I admitted. "I just hope we can get back to being buddies again."

"We are, to be honest, I don't even mind you watching me undressing. You surprised me and I lost my temper! Besides, who could blame you? I have really great tits." She smiled at me, then walked out of my room.

She was right. She really does have amazing tits.