I was crazy horny and all I could picture in my head was my sister Shannon's huge titties and how she had flashed me while doing that sexy, teasing dance in the living room. Damn I wanted more, but I knew that's all I would get, and there was no point double guessing if I should have said more, or done more, or pulled my cock out while she was teasing me and cum right there for her. All I knew now was that I needed to jerk off bad, and I'd be jacking off to the memory of that dance for a long time.
I waited as long as I could; I didn't want her to come knocking on my door, asking to borrow my phone charger or something stupid like that to interrupt me. I made it until just after 9PM, and then couldn't wait any longer. I had changed into boxers and I unbuttoned the fly and took my fully erect, throbbing cock out. I laid back on my bed and I gripped my hard dick lightly with my hand. I closed my eyes, and replayed her dance and tease in my head while I slowly stroked my shaft.
I had barely started when there was a knock on my bedroom door. I jumped so hard I almost threw myself off the bed.
"Chris," Shannon's voice called from the other side of the door. "Can I come in for a minute?"
For fuck sakes! Hands shaking, I quickly covered myself with my top sheet.
"Just a sec!" I called back. I bent my legs so that my boner wouldn't push the sheet up. "OK, come in."
She opened the door and stood in the opening. She was wearing a checked flannel nighty with buttons running the whole length of the front. Only the top two were undone, so I couldn't see any cleavage, especially from my lower vantage point, but I could see her big boobs jiggling underneath and guessed she wasn't wearing a bra. Her smooth legs were very much on display, as the nighty barely went to the middle of her thighs.
"Um, I wanted to talk about what happened tonight," she said.
Here we go, I thought. She's going to say how embarrassed she was that she acted like that, and that I needed to forget it ever happened, and if I told anyone about it she would break my legs.
"I just... I feel bad I teased you like that and then just walked away like nothing happened. I don't know..." she walked into my room as she talked and was now standing at the end of my bed. "I got carried away and it wasn't very nice of me to do that to you and then just leave."
She sat on the end of my bed.
"I just feel really bad about leaving you like that... you know..." she nodded towards my body hidden beneath the sheet. Her meaning was obvious and I just sat there looking at her, probably with a very stupid expression on my face.
"I wanted to say sorry. And... I thought that maybe I could make it up to you..." she said, biting her lip and reaching up to start to undo the buttons on her nighty. "If you wanted..."
My mouth had gone dry, and I was shaking a little with nervousness and excitement.
"Um, oh, yeah," I said stupidly, my eyes glued to her hands as she moved to the next button and slowly her cleavage began to become more and more visible.
Her eyes moved down my body to where the sheet covered me. "Move the sheet," she whispered.
The top five buttons were undone now, and I could see the curves of her huge breasts. I hesitated only slightly before I pulled the sheet back, revealing my hardon sticking out of the fly of my boxers. She actually gasped a little when she saw it and cupped her breasts with her hands, the material of her nighty barely covering them now.
"Jesus, you're really hard little brother," she whispered, her eyes still on my hard cock. "Jerk it for me."
My face felt hot and I could feel my heart pounding in my chest. My sister wanted me to jerk off for her! I took my cock into my shaking hand and began to stroke it.
"It's OK," she whispered, noticing how nervous I was. "Don't be shy."
She continued to stare at my dick as I stared at her juggs. She wiggled them, showing me vast amounts of skin, and a hint of her areolas.
"Oh my god," she said. "I love how that looks. Mmmmm..."
She slowly began to pull her open nighty to the sides, revealing more and more flesh. She stopped just as I could start to see her nipples.
"Wanna see my big titties, Chris?" she asked.
"God, yes," I mumbled, jerking my cock faster.
She continued to tease me for what seemed like forever until finally she arched her back as she pulled her nighty wide open. Her huge tits came into my full view for the first time ever and oh god were they perfect. Big and heavy with light colored areolas and big hard nipples. They didn't hang down at all like I thought they might. They were full and firm, her nipples on top. They were amazing.
"Oh fuck," I grunted, my tongue a little out of my mouth as I jerked off staring at my sister's tits.
"Oh yeah," she said as she cupped her juggs and wiggled them in her hands for me. "You like your sister's big tits?"
"Mmmm hmmm," I moaned.
"Yeah, jerk that hard cock for me," she said, bringing her left breast up to her mouth and flicking her tongue over her hard nipple before taking it into her mouth and sucking on it!
"Are you getting close?" she asked, noticing my breathing had changed as had the pace of my strokes.
"Fuck yes," I gasped, feeling that point of no return where I barely had to touch myself any more. I slowed my jerking right down and squeezed my shaft, holding on for as long as I could.
"Oh yes, Chris," she moaned. "Get that cum out for me!"
"Oh, fuck!" I spurted hard; a huge, thick stream of cum shot out of my cock into my leg. I jerked it slowly as my cock throbbed, more hot jizz pumping out and down over my hand.
"Ooh, yes!" she gasped, watching my cock intently as I came for her. "Damn! Oh shit, that's a lot of cum!"
She was giggling a little, surprised by how hard I shot. Man, it surprised me! I came a lot and so fucking hard.
I kept slowly stroking and squeezing it, getting more cum out as she played with her tits and watched. Once I started to soften a little she tucked her tits back into her nighty (though didn't button back up so I could see her big boobs bouncing and jiggling).
She gave a big sigh. "That was fun," she smiled. "I'd say we're even now. Better clean up, little brother."
She stood and took one last look down at my cock in my hand and my cum on my sheets, then left my room. Giving me a little wave as she closed my door.
Ho-ly shit! I couldn't believe Shannon had just let me jerk off to her! I couldn't wrap my head around it. It happened so fast. Would she let me do it again? Should I have asked her to jerk it for me? Should I have taken pics with my phone. Nah, no way she would have let me do that. I couldn't stop thinking about it. Should I go to her room? I was too scared.
Less than a half-hour later I jerked off again, thinking about it. Then I tossed and turned in bed for over an hour before finally falling asleep.
The next day I was an awkward mess. I didn't know how to act around her. I would stare at her until she looked at me, then I'd look away. I could barely look into her eyes when she talked to me. Before we both went to work, she forced me to talk to her.
"Look, Chris," she said, getting right to the point. "It was just some fun and you need to stop acting all strange. If we're going to do it again, you need to stop weirding out about it, OK? See ya later!"
I watched her leave and all I could concentrate on was her saying 'if we're going to do it again...' Hell yeah, I'd force myself to stop freaking out if it meant she'd let me jerk off to her tits again!
That was perhaps the longest shift I'd ever worked. I wanted the day over so I could get home. I could barely eat on my break; my stomach was churning with excitement. Would anything happen tonight? Would she maybe let me touch her? Holy fuck I was excited. Then as I always do, I had to let negative thoughts sneak in there too. What if during the day at work she changed her mind and decided once was enough? Or even if we had a chance to do it again, what would happen when Mom and Dad got home the next day? That'd be it for sure. And then soon we'd both be off to school. Damn. I forced myself to concentrate on the here and now and to worry about tomorrow later.
My shift finally ended and I hurried home. After changing clothes, I tried to play some video games while I waited. She was late. About a half hour after she normally would have been home, she texted me.
