The summer was nearly over. It was down to three days to go before Shannon went back to school. I had to start up school too a few days after that. Shannon was mostly packed, her room crowded with stuffed bags and bins and boxes. She kept teasing me when she could, but was so busy with school prep, we weren't getting much time to be alone long enough to do anything other than a quick flash or feel here and there. Any spare time she did have, she spent with her friends. I was starting to look ahead, thinking maybe we could have our next encounter if she came home at Thanksgiving, or maybe I could even visit her at school?
Shit, every day that last week I did my best to get her alone long enough so we could fool around, and every night I ended up settling for jacking thinking about fucking her.
Finally a day arrived where Mom stopped worrying about Shannon not being packed on time, and she and Dad were out of the house at the same time during the day.
I found Shannon in the laundry room, folding some of her clothes. She was wearing yoga pants and a sports bra but no shirt. The bra supported her titties well, but also showed off how huge and round they were. Her blonde hair was pulled back in a ponytail. I quickly moved in behind her and reached around to cup her big tits, grinding myself into her ass as I did. I loved the feel of her curvy body pressed back against mine.
She laughed, and let me fondle her.
"Oh you poor boy," she said softly. "Mom's not going to be gone long..."
"I don't care," I grunted. "You turn me on so much!"
She laughed again and turned, looking at me for a long moment, as if trying to come to a decision. Finally, biting her lip, she took me by the hand and lead me out of the laundry room and into the rec room. She gently pushed me into the couch and then knelt on the floor between my legs. Her hand went to my crotch and she sighed as she felt my cock under my shorts.
"Holy fuck you're already rock hard!" she said and started to unzip my fly. She pulled my hard dick out and began to slowly stroke it, breathing heavily as she watched her hand sliding and twisting up and down my long shaft.
"I never, ever thought I'd be jerking my brother off," she said. "It's so naughty. I never thought my brother's cock would be so big either. Damn, I'm still shocked!"
She continued to stroke it and then she sat up a little higher in her knees and leaned in closer to my crotch.
"I definitely never thought I'd suck my brother off," she purred and took my cock into her mouth.
I moaned with pleasure. It felt so good and was so taboo that I nearly came in her mouth right there. But I held off and she began to bob her mouth slowly up and down my shaft, pulling off now and then to kiss up my length and lick all around my swollen head.
Just as she started to pick up her pace and I was getting really close to cumming, her phone rang. She pulled her mouth off me and took her phone out of the waist band of her pants.
I was about to complain and tell her how close I was when she looked at the display and said "Shit, it's Mom."
I cursed in my head. Shannon accepted the call and brought the phone to her ear with one hand, and started stroking me again with the other. Mom was obviously asking her about her packing and probably about last minute things she needed. Shannon kept assuring her that everything was good, but when it was obvious she wasn't going to get her off the phone quickly, she rolled her eyes at me.
She stopped stroking me and I thought that was going to be it, but instead she lifted the bottom of her sports bra and guided my cock under the band so that it was now sticking under her bra, squished between her juggs! I could just see the head of my cock poking up between her cleavage. She started to move her body up and down a little, titfucking me with her boobs pressed together, her bra holding my cock tight. She continued to talk to Mom on the phone, looking me in the eyes while she slid her titties up and down my shaft.
"I think he's outside," Shannon said after a minute or so and I realized Mom was asking about me. Shit! I hope she didn't want to talk to me. "Yeah, I think I see him, hold on."
She held the phone away from her ear for a second and whispered "hurry up!"
Putting the phone back to her ear and virtually bouncing on her knees now, fucking me good with her tits, she continued talking with Mom.
"OK, I think he's about to come..."
That was so hot and naughty it brought me right to the edge. She bounced a couple more times and I tried not to moan too loudly, breathing heavily through my nose as my cock throbbed between her tits and started to spurt.
