“Least I could do after all the indulgences you’ve given me, our terrible chats. You make me crazy you know that?” She settled onto the leather sofa. “We should not be doing this. Any of this.” But her words belied what she was doing.
She lifted her foot up on the sofa, and lay her knee at the back of the sofa opening her legs to me, and she made no attempt to cover herself. Completely exposing her pussy, legs pulled so wide her lips parting and I could see her shining slit open up.
“No one will know. Ever. Our secret.” And I grasped my cock once again.
In response to my movement, she lay her hand over her bush.
Silence. I watched her finger slide lightly through the center of her slit. Rubbing herself in long delicious strokes, and then circling her clit and back down.
She cooed, “Horny?”
“Yes. You?”
“I been horny all week. Want to watch something else?”
She dug her finger deep into her slit and began sinking it into her hole, and up around her clit. The movement opened her dark bush and her white clit came peeking out, so swollen. God I wanted that. Her hand moving faster, she began to slide her fingers back and forth over her clit, faster and faster, and plunging two fingers into her hole.
I was sliding my hand up and down my cock, running along the slippery lubrication, as my sister watched my hand working. And then I had an inspiration.
“Got any of that chocolate cake left.”
“Yes.”
“You hungry for cake?”
Knowingly she got up, and in a moment was back with a thick slice of chocolate cake.
She held the cake in one hand and took a bite, with the other she stroked herself. “Mmmmmm.” Cake crumbs dropping and sticking to her tits and tummy, sticking to her sweaty skin, chocolate smearing to her lips. God this was too much, our absolute perfect fantasy. It had been building for months. She began to masturbate again.
Her finger working up and down her slit, and squirming to her touch, soft moans as she held her mouth open touching herself and holding the cake. As I continued to stroke my cock, I stood up and moved toward her.
Her eyes widened, “Ah. Ah. Ah. You can’t touch me!”
“I’m not, not with my hands.”
And I stood with my cock pointing at her, pumping my cock, slippery with precum along my shaft. I was going to cum on her, she realized right away.
As I positioned myself between her legs she took a dollop of chocolate frosting, and smeared along the length of my cock, gripping my cock as she did.
As I watched the bells going off! My god. She touched me! I stood with a line of chocolate smeared along the underside of my hard cock. As I again grasped my cock and began to pump realized the frosting was lubricating my shaft, and I could pump myself faster. Covering my cock with melting and slippery chocolate.
And I realized something about my sister. She was so turned on by my chocolate covered cock, by being dirty, by the food on her body. Naked and sweaty, dirty, cake crumbs and frosting. She was totally turned on by the idea of me cumming on her, my little slut who loved to be dirty was about to get VERY dirty, covered in my cum dirty.