It all started two weeks ago. My step-sister is 16 years old. My parents left for the evening and I was really horny. My step-sister is a good-sized girl. Not fat, but just right. Like I said, I was horny. She stays in her room most of the time. So this night was no different. I walked by her room and peeked through the crack of the door, and I could see her in a nice yellow thong. WOW! I could not believe it. I felt my cock get hard. Oh yes, it was hard. So, I slipped a note under her door and it said, 'If you want to fool around then open your door a crack.' Well, I walked away and went to the kitchen. I heard the door open a little. I walked in and she asked me how I was doing? I looked down and saw that she was just wearing a thong and a bra.
She said, 'Let me see your dick, so I pulled it out and she started to stroke it.' Then I figered her. We were doing this so much that we started to cum.
WOW! That was awesome.