My Sister Annie Catches Me Again!

I had just arrived home from the city. I had to go in for a meeting at school. Normally, my sister Annie and I both work from home, but every now and then I have to visit the campus. The house was quiet, our parents were away at their jobs. I guessed Annie must be busy working in her room. I made my way upstairs quietly so as not to disturb her. As I got to the top of the stairs, I could hear a noise coming from her room. It was not the usual noise I would expect to hear from Annie's room, it was the sound of people having sex.

I took quiet steps to just outside her door and looked in. I could see her desk computer from the door. She was watching a porn clip; a woman was sitting on a guy's face, she seemed to be squeezing his balls. Now that's interesting, could Annie be into ballbusting? She's kicked me in the balls a couple of times lately. I thought she was just angry at me. I had to wonder if she likes it. I craned my neck to see further into the room. There was Annie on her back, her legs spread apart, and her finger rubbing her clit.

My cock twinged at the sight, holy shit! Holy shit! Annie was completely naked, and she was running her finger up and down her clit. Her other hand held one of her breasts. She looked so sexy and pretty. My cock was instantly erect. I decided I'd better leave quietly, so I backed up and headed for my room. I could hear her moaning from across the hall. I did my best to ignore her.

But I couldn't.

It was impossible. I had to see that again, I snuck back into the hallway and peered into her room. Her finger was in her pussy, she was working it fast and hard, her face was red, and her eyes were closed.

"YES! Oh yes," she moaned loudly, she was orgasming, and I got to watch it. It was so beautiful and sexy, my cock was completely erect. I slid my hand in my pants and squeezed my cock, I decided to just blow a load into my shorts. I pushed them down and started jerking off as I watched Annie. It was perfect, it was going to happen in no time, it felt so good. I pretended I was helping Annie get off. I imagined eating that pussy and playing with her perfect and perky breasts. I lost myself in it, I was seconds away from cumming.

"What the fuck?" I heard Annie exclaim. She stood up and marched over to me. "What the fuck are you doing?"

"I, uh, I saw you masturbating. I couldn't help myself." I quickly yanked my hand away from my cock, but my erection was obvious.

"You fucking pig!"

"Have you ever thought of closing your door?" I nearly shouted. As soon as it left my big mouth, I knew I made a mistake.

"Fuck you!" she exclaimed, and at the same time, she snapped her foot up into my balls. My shorts were still halfway down my legs. I stumbled back and fell to the floor. I twisted around and managed to get up to my hands and knees. My shorts had slid down to my ankles. I tried to reach underneath and get them, but before my hand made it, Annie kicked my balls from behind.

"FUCK!" I groaned. I fell face down and lay on the floor. I felt Annie yank my shorts off my ankles, then she pushed my legs apart. I was overwhelmed with the pain in my balls, just doing my best to hang on to consciousness. I didn't realize what she was doing until I felt her foot press down on my balls.

"You have to stop spying on me, this can't happen anymore," she said slowly, with each syllable she pushed on my balls, squashing them into the floor.

"This is not acceptable behavior from you. If I have to, I will destroy your balls to make you stop." She was putting her weight into it, the pain was nasty, but at the same time, she was mashing my cock, whether she meant to or not.

"It's not okay to watch me masturbate, next time just walk away," she said emphatically. I thought about answering her, to tell her that I tried, but I didn't think I could speak.

"And stop being a pig!"

I came right about when the word pig left her lips. She smashed my cock and balls with her foot. That mix of pain and pleasure overwhelmed me, and I blasted a load of cum onto the floor between my legs.

She continued to lecture me, pushing on my cock and balls with each word she spoke. She didn't seem to notice the puddle of cum I was leaving on the hallway floor.

"Ohhh, fuck!" I groaned loudly. It felt so good, it hurt so much, it was fucking perfect. I turned my head to look back at her naked body standing over me. I could just see her pussy, and as always, her tits looked so perfect.

She finally looked down at me, "I can't believe you came!" Then she took aim and tried to kick my balls again. She couldn't really get to them, so she rolled me over. I tried to sit up and get a better look at her naked body. She saw what I was doing, she took aim, and snapped her foot into my balls.

"FUCK!" I groaned, another perfect shot to the balls. She had great aim. I was still cumming, even the kick felt kind of good, that crazy mix of pain and pleasure. Still, I didn't want any more kicks, I tried to cover up.

She stomped angrily out of her room, "If you're still here after I finish in the bathroom, I'm going to fuck up your balls beyond belief." I stared at her naked body as she left, then I crawled out of her room and made it back to mine.

Holy fuck, that was hot.