The other night I got home from work to find the house dark and quiet, with the exception of my now thirteen-year-old stepsister sitting at the computer. I asked where everyone was. She told me that they had all gone to bed about an hour ago, but she wasn't tired. 'Oh,' I said. Then I went into my room, stripped down to just my boxers, and was sitting on my floor reading a magazine and rubbing my cock as I usually do. My stepsister opened my door, looked down at me, and smiled.
'I know, you have to go to the bathroom,' I said.
'yep,' she said.
So she went and came back out and said, 'Do you remember that time we masturbated each other?' (see my previous story).
I said, 'Of course.'
she asked if I wanted to do it again, and I said, 'I thought you would never ask!' Right away, she pulled her shirt up over her head showing me a cute blue bra, and boobs that were noticeably bigger than our first time. Then, she undid her pants and slid them down in a very sexy manner that nearly made me cum right then. And to my delightful surprise, she was wearing a red thong!
I said, 'So, you wear thongs now?' and she said, 'Yes,' smiled, and turned around to show me her perfectly shaped butt, with the thong-style panties riding up it. Then, with her back still to me, she unclipped her bra, and let it fall free to the floor. Then she turned around with her hands covering her boobs, and said I couldn't see them until I took my boxers off. Needless to say, they were gone in a flash. Then she moved her hands to show me her boobs, with my rock-hard 7.5-inch cock pointing right at them.
All that was left was the thong. She immediately bent down and elegantly pulled it down to show me the amazing pussy she keeps cleanly shaved. She sat down right next to me, eyes locked on my cock, and started masturbating. After a few moments, she looked up and asked if I was going to start, so I did. My eyes were fixed on her right index and middle fingers passionately going in and out of her pussy. We both orgasmed at the same time. Then, she got up; she didn't bother to get dressed and went up to bed.
We have had a few more of these experiences, which I will continue to share.