I had walked into the living room and saw that my sister, Jennifer was sitting there on the couch. She said she was bored and wanted something to do. I sat there thinking about what would be a great past time, but before I could think of a good idea, she got this smile on her face.
Jennifer said, "Let's make a bet."
I said, "What kind of bet?"
She said, "Let's pick a card and whoever gets the high card wins."
I asked, "What if you win, and what if I win?" She said, "If you win, I have to get naked and if I win you have to get naked. Whenever you or me want either of us to and keep our clothes off until one of us says it's ok to put them back on." I seemed skeptical at first and was about to decline when she blurted out that I could do whatever I wanted her to do if I won, but she would never have me do anything that would make me really uncomfortable.
I got an instant erection when she said she would get naked if I won. As if drawn by a magnet, my sister's eyes just happen to look down at my crotch and she saw the tent I had in my sweat pants.
She giggled and said. "It looks like you're up for it."
So I agreed to her bet. She proceeded to stand up and get a deck of cards. As she stood up, I couldn't stop admiring her again for the millionth time. When she came back, she picked first, grabbing a random card from the deck, but didn't show me her card. I picked a card and had a 5. She smiled and showed me she had an 8 which means I lost. She looked at me and smiled, saying, "Come on take them clothes off." She had a huge toothy grin on her face. She sat there in her jeans and t-shirt watching me as I started to take off my clothes. I started with my shirt, slowly lifting it over my head, watching as if a sun rose on my sister's face, the look of pleasure that dawned on her face. Then my sweat pants were next and as I stood there in my underwear and socks, Jen piped up that she wanted the socks off first and my underwear last. The bulge in my underwear seemed to get even bigger. I could tell her eyes were focused on the bulge in my underwear and she said, "Take them off. I want to see it."
I put my hands on my underwear and pushed them down to my ankles. I let them drop to the ground and stood there totally naked with a major hard-on in front of my sister as she sat there, fully clothed, looking at me naked and staring at my twitching hard-on. She sat there staring at my hard-on as it pulsed and it took her moment to say something and she said, "Are you always in this condition."
I said, color rising in my cheeks, "Well I am like this a lot and I do get aroused and hard very, very easily."
"Hmm that's good to know," she replied.
Then she told me to stroke for her. I did what she asked and slowly pumped my engorged cock up and down. She told me not to squirt yet, so I ended up having to stop as I got close to orgasm. She had me sit next to her. As I plopped my naked ass beside my sister, she leaned over to my ear and whispered that she hoped I liked being teased because that is what she is going to do to me. She put her hand on my leg and caressed it. Her hand felt so warm and soft. She asked, "Did I prefer playing with it myself or having someone else play with it instead?"
I told her, "I liked them both the same."
She said, "Really?"