The Repairman.
One night after the kids were asleep, I dug out our 8 mm projector and put on some porn I had picked up from a friend on what then was then the good ones, 100 foot color films, this was 1973 after all. We were projecting the movie on our bedroom wall while my little redheaded wife was riding me like a wild woman. In this movie, the husband had left for work and in comes the repair man and the woman drops to her knees and starts sucking this big cock. Soon he has her in bed fucking her like crazy. When he pulls out and she finishes him off by taking his load in her mouth, my little wife says, "Man, what a waist. I'd want that load deep in my pussy."
Now I'd never heard her say anything like that. I asked her, "So if you got the chance, would you take a big cock like his? She was still rocking me while she was thinking.
Then she said, "I don't know. I guess most women fantasize about taking a lover while their husband is at work. If I wasn't satisfied with you, I might consider it but you know I'd never cheat on you." She leaned down and kissed me as she pushed her hairy red pussy hard against my crotch as she orgasmed.
I whispered, "Does the thought of a big cock turn you on that much?"
She sat up and playfully hit my chest saying, "With my luck, you'd come home and catch me. What would you do if you caught me fucking some guy, huh?"
For some reason I said, "I don't know, hell, I'd probably strip and join in and find out what sloppy seconds feels like."
Apparently she liked that idea as she began rocking furiously which brought her to a very big orgasm which also got me off as her little pussy spasms and squeezes me when she does. It was just a bedtime fantasy, right. We had been married six years and sometimes used fantasies to spice things up.