All people are fictional and all people are over 18.
It was almost time for dinner as I looked into the eyes of my sister. She sat there in my lap and just ground her butt into my dick. I knew she could feel the lump in my pants, it felt like I would explode right there. She just kept moving her ass back and forth while her eyes were locked into mine. Then she took a deep breath and moved her head closer to mine. She pursued her lips a little and stopped as if she was waiting for my approval.
I moved forward and her lips touched mine, we locked our lips together. Then I pushed my tongue in between her lips. We swirled our tongues together, I was so hard. My heart began to pound, I new this was so wrong. I knew she knew this also.
I slid my hands up inside her over sized sweat shirt, it was purple in color. This was her favorite thing to wear when I came to visit. If I showed up for a visit she would come and give me a hug, then in a dash she was gone. But it was not long, she would show back up wearing this oversized purple sweat shirt.
She was sitting on part of this purple shirt, so when I went to put my hand up in her shirt. I had to put my hand on her leg and slid my hand up her leg. I slid it up until I could feel the curve of her hip. I almost thought that she had no panties on. But then I felt the strap of a g-string.
I curled my finger under it and pulled it back some, then let it go. It snapped against her hip and she raised an eyebrow at me. She swirled her tongue a little harder on mine. Then I let my hand slide up her belly. I pushed my hand up further and then noticed she was not wearing a bra. That was when I raised an eyebrow up at her.
She moaned long and deep as I lightly pinched her nipple between my fingers. Then I moved my thumb back and forth across her nipple. She moaned louder and ground her pussy even harder into my lump she was sitting on.
She raised up her ass as she straddle herself over me while she placed a knee on each side of my hip. Then she took her hands and moved the shirt out from under her butt. Now the only thing between her pussy and my dick was her g-string and my jeans.
She sat down hard in my lap, I wanted to reposition my junk. Yet I did not want to loose this moment. I have been longing for this for so long. Then she ground her pussy on my lap. I pushed back even harder, I could feel my dick start to move some, so I pushed even harder. Then my dick slipped some into a better position. I kissed her even harder.
Then she spoke,
"Tim I want to get a shower with you, let's go upstairs!"
Me,
"Let's go, I brought a surprise with me this time. I could change when we are done"
We practically jumped when we raised from the couch. I still had the feel of her nipples in my head, I wanted to suck on her tits so bad.
She led me by the hand and practically pulled me over as she pulled on me to follow her up the stairs. There was a half bath on the first floor, but the shower was upstairs.
She let go of my hand when she could tell I was following her and then she pulled the over size purple sweat shirt over her head and threw it over my head and down to the bottom of the stair well.
Then she stood there as she faced me. She was now naked except for her g-string. I had her tits in my view, they were lovely. Her areola was five times the size of her nipples and they were dark. Her nipples were sticking straight out. They were not soft, they were ready for me to latch my lips onto them and swirl my tongue around them. I was memorized by her beautiful form.
Then she grabbed my hand again and pulled me hard.