My sister Eliza has been busy the last few days, and she hasn't had any time to bust my balls. First it was her summer job shifting into overtime, and then she's training for a triathlon, so she's been at the gym all the time. What I'm saying is ... I'm horny as fuck. I haven't cum in days, and I want my sister to squeeze my balls again.
It wasn't going to happen, though, because Eliza just left for the gym to meet some of her training buddies. No one else was home, so I wandered around the house. I soon found myself in Eliza's room, and it didn't take long for me to open her dresser and look at her panties and bras. I held up one of her bras, with nice large cups and heavy straps to hold big tits. Then I pulled out a pair of her panties. They were clean, so I decided to check her laundry basket in the closet. There they were, a pair of dirty panties. I couldn't help myself; I picked them up and sniffed them. There was the unmistakable scent of pussy, my cock got so hard I could barely stand it.
Next thing I knew, I had taken my cock out, and I was stroking it with Eliza's dirty panties. The soft fabric felt good on my cock, but I wanted more. I wanted my balls to hurt. I looked at the bra, and decided I could wrap the straps around my nuts. I made some loops, pushing my balls to the end of their sack, and then tied a bow. I slapped at my nuts and began jerking again.
It felt good, and I needed to cum. I looked around for some tissues, but didn't see any, so I decided to cum in Eliza's dirty panties. I smiled to myself as I thought about how nasty I was. Jerking to my sister's panties, and then cumming in them. I was so swept away in it all that I didn't hear anything. No sounds. No noises from my sister parking her car or walking up the stairs. Not a thing ... until ...
"MATT! What the fuck are you doing?"
Fuck! My pants were around my knees, my cock out and wrapped in Eliza's panties, and my balls tied up in her bra. I stopped stroking immediately, pulling my hand away from my hard cock, but it betrayed me as it twitched.
"UH ... fuck ... I lost my mind?"
Eliza broke out laughing as she pointed to my cock wrapped in her panties. "What a fucking pervert." She was almost choking, she laughed so hard. She stepped up to me and grabbed my balls. I let go of the panties around my cock and stood with my hands behind my back, ready to take whatever punishment she dished out.
"You are a dirty, nasty plaything," she said, looking me up and down. Then she pulled her sweaty gym shorts off and yanked down her panties. They were clearly damp. She took them off and stuffed them in my mouth. They tasted of pussy and sweat. It only made my cock harder. She pulled off her sweaty bra and hung it over my head. One of the cups was over my nose. My cock only got harder still as I smelled her scent.
Eliza pulled me over to an old love seat that she keeps in her room. She likes to study on it, and I've seen her fall asleep while lying sideways on it. She sat me on the arm of the love seat, then pushed me onto my back so that I lay on my back, with my cock up above me on the arm of the chair. My cock pointed down at my face.
"You know you can't be doing this. I won't have you rummaging around in my room," she said.
"Mmmm," I agreed. Unable to form words with her panties jammed into my mouth.
"I'm going to punish you. Hopefully you'll remember what happens when you do this, and never do it again."
"Mmmm."
She took my hand and placed it on my cock, "Jerk yourself off, and point it at your face when you cum." Then she moved over to stand between my legs. She took one of my balls in each hand and squeezed them between her fingers. Not gently. Her fingers wrapped around my balls and squeezed, firm and possessive. A jolt of raw heat shot up my spine.
"I said jerk it."
I did. Slowly at first, trying to figure out how I got there. Eliza stood naked between my legs, the front of her pussy just visible from where I was lying, and her big tits looked amazing as always. Her sweaty bra was over my face, and her sweaty panties were stuffed in my mouth. Her tits are so nice, I focused on them as I began stroking my hard cock. I bet they smelled amazing. She moved her fingers around, then jammed her thumbs into my balls.
"MMMMM!" I moaned through her panties. There it was, that pain that I needed. Fuck, it hurt, but fuck, it felt good. Her thumbs pushed deep into my balls, the pain shot through me like a knife. I cringed and squirmed, but I also tried not to pull away. I deserved the pain. I was being a pig. I needed Eliza to punish my balls. I fucking loved it. I began stroking faster as the excitement built in me. I needed to cum so badly. I stroked and stroked. I looked at my cock, aimed right at my face, and ready to spew cum on me.
"MMMMMM!" I moaned. Oh fuck, I'm so close. I squeezed my cock as I stroked. "MMMMMMM!"
"Cum for me," she said. "You want it so badly, you want to spew cum all over your nasty face."
It felt like I was watching myself in a movie. I no longer had control of what was happening. I jerked, she squeezed, and then my cock spasmed and shot a rope of cum onto my left cheek and the corner of my mouth. Warm and insistent, it dripped down my face. The next rope of cum landed on my chin and down my neck. Eliza squeezed harder, milking my balls with ruthless precision, and my cock kept throbbing and blasting cum.
"Holy fuck," she said, looking at me. Cum was everywhere; it covered her bra, all over my face, and down my neck. Eliza's hand continued kneading my balls as she worked to milk all the cum from me.
"You're covered," she said, looking me over. "Just fucking covered."
My chest was still heaving, breathing hard through her panties.
"You liked that, didn't you?"
I nodded yes and moaned through her panties.
I couldn't have planned it any better.