Last night was the best night I've had in a while.
At home it's just me, Dad and my twin sister Katie. My mom died a few years ago. Dad, Katie and I have always been very open about everything, including sex and masturbation. He told us we could jack (or jill) off whenever we wanted to as long as we did it in bed and under the covers. Katie told me a few days ago that she masturbates almost every day but hasn't been able to orgasm. She asked if I could teach her how to cum. Dad had to leave yesterday morning and would be gone for almost a week because of a business trip.
After my mom died, I was cleaning the attic and I found Mom's sex toys. I threw all but one in the trash. The one I kept was a remote-controlled three speed vibrator. It gives my girlfriend the most intense orgasms. As soon as Dad called to tell us his plane landed I went and got it and took it to Katie's bedroom.
I had Katie strip and lay on the bed. The only thing I could say when I saw her nude was 'Wow! Your tits and your pussy are gorgeous.' I stripped so Katie could see how hard she made my cock. She told me to get myself off first so I could focus on her. I jacked off and came all over Katie's sexy tits. Now it was her turn. I told Katie to push the vibrator in and out of her pussy with one hand and put pressure on her clit with the other hand. I worked the remote while I played with her tits. I started it on low and Katie immediately began moaning. Then I started it between medium and high. In no time Katie started to cum. She yelled out, 'Fuck, Donny, you make me feel SOOOOOO good. Don't stop.' I rubbed her clit and she came even harder. She pulled the vibrator out and squirted all over the bed. It was almost thirty minutes before she was able to get up to clean the mess. We cleaned up and then went to sleep on my bed. Katie fell asleep with her hand on my cock. I fell asleep rubbing her pussy.