I do have a long standing fantasy. I know it is very unlikely to appeal to you, but here goes.
I am with a beautiful lady like yourself. We are in the mood and are making love. I am a tall fellow and appropriately well hung. I give you lots of attention and spend lots of quality time with my tongue between your legs. Finally we climax together and relax into each others arms. Then you decide we need to have a little talk.
You tell me you love me dearly but in the end I do not have enough driving energy and power to make you satisfied. You need another younger man not for companionship but for hard driving sex. You know he will not take the time and have the patience to lick you privates to your full satisfaction but that is what you have me for. So for now on I will be your beta male who licks you before and after you get fucked by a younger man you have picked up.
I feel such angst but at the same time I feel excitement flowing into my man flesh. I don't want to but I can't help it.
While you are enjoying his hard dick you will watch me and smile. I will look on at you with longing, while I play with myself. Finally when Mr Alpha is exhausted and leaves I will get to clean up you pussy with my tongue.
Then you will jerk me and when I cum you will laugh and say. "There you go my dear Beta maybe I will let you fuck me again one day but for now that is what you get don't you love it?" I don't have to answer, you know how I love to be with you, how I love to lick you, how I like watching you getting your ultimate climax from a good hard pounding. Yes Darling I am content.