Using your mind

I had a "friend with benefits"a few years ago. We both had come out of relationships and it gave us chance to explore a few exciting things. One evening i received a text asking if i was up for some fun.  Fifteen or so minutes later I was knocking on her door.  She opened it wearing one of her front zipping dresses. I always knew we were in for a bit of fun when she wore that. She told me to go upstairs, take my clothes off, put on the blindfold and lay still on the bed.
So i went upstairs, took my clothes off, put the blindfold on and lay on the bed to await what she had in store for me that evening.
I heard footsteps up the stairs and she walked into the room. The next sound was the zip on her dress so I knew she was undressing. My cock started to stir. Then she walked round the bed and i heard the bedside drawer open. There was a scuffling noise like she was looking for something. The drawer closed so she must have found what she was looking for. It didnt take long for me to find out what she had found. This noise was the whirring noise of her vibrator. The noise pitch varied. I thought I know what she is doing. The vibrator is sliding in and out of her pussy. This sent the blood rushing into my cock. I felt it lift from my stomach. The noise stopped. I could then hear another quieter but it was a gooey noise. She was rubbing her pussy and it was getting wet. This made my foreskin go back on its own revealing the head . She made a little gasp as this happened. The noise from her pussy got louder and faster which made my cock so hard it hurt. I then heard a noise from her wardrobe like someone climbing out of it.one and the another zip opening.... did she have a friend here??? Was I about to have the threesome that she had talked about? Now I really didn't know what was happening but I couldnt believe how hard my cock felt. The bed then moved so someone was climbing onto it. I felt legs astride me and a hand took my cock and rubbed it against her pussy.  I could tell the pussy was really moist . She lowered it onto my cock . We then began fucking furiously. I could tell it was my fuck buddy because of the moaning and screaming noises that I love to hear.  It could only be her. I knew her screaming that she was going to cum so I thrust my cock in even harder to bring me to the brink and her pussy tightened. I knew at that point she was cumming and that grip made me shoot spunk deep inside her. She collapsed in a heap on my chest. I was curious to find out what that was all about. She took the blindfold off and explained.

Here is what actually happened.  She walked in the room and undid a zip on another dress and dropped it to the floor . She was still fully clothed.  The vibrator noise was made by wrapping her hands around it and then letting go to make it sound like it was entering her. The vibrator never went anywhere near her pussy. The other noises she climbed in and out of the wardfobe... a plate of jam !! She wasn't masturbating. The idea was at this point to take off my blindfold and reveal what actually happened but she said she had never seen my cock so big and wasn't going to waste it so off came the dress for real and she jumped on the bed and got my cock inside her. I got the arousal from what my mind was thinking and she got hers from seeing my cock grow without any touching and just from what I assumed was happening.
It was a great session but it is one you can only do once. Please let me know if you try a similar thing.
We did have a threesome eventually but it was a mmf one which was also very exciting. I will publish that story as soon as I have time.