Sick fantasy?
My fantasy is I'd love to watch my wife have sex with other men.
I'd love her to go and pick up a guy, or meet one off the internet, someone with a big c*ck, long and thick, actually two or three guys would be better. Bring them home, then tie me to a chair naked and then get f**ked for hours while I have to sit and watch. Watch as they f**k her with their big thick c*cks, filling her with their cum again and again. When they have finished she would make me lick her clean. Then maybe, just maybe, she might let me f**k her.
Don't know why but this really turns me on.