I am a skinny blond with CC boobs and a slight tan.
One Saturday morning, me and my sister where home alone and I woke up and was feeling hungry so I went down stairs to get something to eat. I made my food and then sat down on the couch and watched some TV. When I was finished with my breakfast I took the plate back to the kitchen and sat back down on the couch.
I was feeling horny and I thought my sister was still asleep so I thought I would just masturbate right there. I reached my hand over my wet pussy and started rubbing, but I could not wait any longer than that so I slid my panties and pajamas down to my ankles, laying my legs across the couch. I started to put my fingers inside my pussy and started to rub faster.
Then I was rubbing furiously and was about to cum when I heard my sister ask me what I was doing. My sister has blond hair, cc boobs and is 16 years old. Before this point we did not know each other masturbated. Well anyway I quickly put my pants back on and said nothing, but she said it was okay to do that and that she was sorry for interrupting. Then she went back up to her room upstairs.
I quickly pulled my pants back down and finished myself off with the best orgasm I think I have ever had. Then I went back upstairs to my room and passed by my sister's room and I heard the bed squeaking and knew what was going on.
Later the next week I caught my sister having sex with her boyfriend. But thats a different story.