My sister and I are identical twins. I'm Hannah, and she's Hayley. We are best friends. Years ago I had just learned about masturbation from one of my guy friends.
After I learned about masturbation, I couldn't stop thinking about it. I had no time alone. Finally, one weekend my parents left my sister and I alone. All I could think about was telling her about it, and possibly trying it out.
'Hayley, come here' I said, one Friday night. We had just watched a movie, with some male nudity in it, and I knew that I was excited, and assumed she was too. 'What?' she asked, annoyed. 'Come into the bathroom' I said. She came in, and I told her to sit down. 'Pull off your panties' I said. She was shocked. 'No!' she said. 'just do it, I'm going to show you something. Finally, I convinced her to pull her panties down. She shaved her pussy smooth, just like I did. She was already a little wet. 'what are you going to do?' she asked, interested. 'One of the guys told me about this' I said. I dipped a finger into her pussy, and started going in and out. She was tight, and I didn't want to hurt her. 'What the hell!' she screamed, but then I got to her clitoris. 'OOOOHHHHH' she moaned, enjoying herself. 'Doesn't that feel good?' I asked, stopping. 'Keep going, don't stop.' She was groping at her nipples. Within a couple of minutes, she came for the first time, wriggling and moaning in our bathroom. 'Ok, now do me!' I said, excited. 'Ok, follow me.'
She led me to our room, and laid me down. she had stripped totally, and told me to. I took off everything, and got ready. She started by putting her index finger in my very wet pussy, and used her thumb to get to my clit. 'Oh god, I didn't know this was so goood!' I moaned. She was pumping in and out, but only up to her second knuckle. After just a minute, I came, and it was huge. Afterwards, I couldn't stand my knees were shaking so bad.
That was a few years ago. Now, every night, before bed, we still masturbate together. It's always great, and I'm hoping the guy who told me will be able to join us someday.