I masturbated to this fantasy for years until I married my second wife when she was in her 60's.
I worked with a girl younger than I and there were some sexual innuendos for the first couple of months. One day we had to stay after hours alone to finish up some things.
After finishing, we got to talking and after a while she was sitting on my knees. She asked, "Is it okay if I turn around and face you?" With that she swung around and straddled me. Her beautiful tits, under a T-shirt with no bra were inches from my face. My dick was instantly hard. Soon she was grinding away and my hands went up her shirt feeling her tits. Soon she reached down and started rubbing my hardened cock through my pants. I lifted her shirt and started sucking those luscious tits. I could hardly believe this was happening. It had to be a dream!
Soon she asked if I wanted her to make me cum. I quickly moaned "yes' and assumed she meant that she would continue rubbing my dick through my pants. Instead, she said, "Let me put it in my mouth". In no time, my pants were down to my ankles and as I sat in the chair she knelt on the floor in front of me, smiled up at me, and slowing licked the pre-cum off the head of my throbbing dick. She gave the head a few more licks then slowly put it in her mouth.
She slowly started moving her mouth up and down, slowly building to a more rapid pace. OMG, it felt so good! The feeling was intense and it didn't take long to feel cum building up. I was in a stage of ecstasy! When I reached the point of no return I yelled, "I'm going to cum". Instead off stopping she kept going and swallowed every drop of what had to be my most intense orgasm ever. She got back on my lap, gave me a deep cum kiss, and said, "Your turn to do me, OK? Unfortunately it was all a dream (My sexually uninhibited second wife pretty much fulfilled the dream! You just never know about Church going older ladies do you?)