This story is about my college days with the horny lady that became my wife and her sister that is one of my predominant masturbation fantasies after these events
My wife to-be (wtb) lived in a one room buffet-style apartment with her sister, who was three years older. My wtb was really horny, and I just couldn't say no. Occasionally we would end up partying late and it didn't take much coercion on wtb's part to get me to sleep the night in her little twin bed with her sister in her own bed across the room.
Of course in the morning my morning wood was always apparent. One day my wtb was hornier than ever and although I don't think I would have initiated sex with her sister there, but she wouldn't take no for an answer, whispering how much she wanted it, I was powerless to say no. I'll leave details out since this is ST. I'm trying to be quiet while pushing into my wtb. She was doing her best as well. I don't know if we were being rude, but I was past the point of caring.
I glanced over at her sister and although she was feigning being asleep, I could see that her hand was between her legs and her face was flushed. I quickly shot my load and then we got up and out of bed. Later when we were alone, I told her that I thought that her sister was masturbating while we were fucking. My wtb said, "oh yeah she masturbates all the time."
At that time I was naive enough to think that was something just guys did. When I asked my wtb if she did, she said "that's what I have you for." The thought of a girl that "masturbates all the time" really turned me on. I think that was my beginning of my fascination with female masturbation. I love to see ladies pleasuring themselves, oblivious to who might be watching or even being turned on by others watching. As good as sex with my wife ever is, I still need my dirty alone time when I can fantasize about any scenario.
One of my favorites is that my sister in law doesn't try to hide that she is watching me fuck my wife, but is an active participant. I imagine her fingering her pussy while encouraging me to fuck her sister harder and to cum all over her. Well that's my short contribution. Thanks to all that make this such a horny place. Keep on soloing.