To start with, this would ideally be for longterm play. I prefer using discord, but reddit messages are still fine. The core idea I want to explore today is the pairing of a father with his son's girlfriend, or something along these lines. I'm flexible on how it happens and who takes charge, but I have an idea to start the conversation if nothing else:

My son had just finished up his first year of college, where he had met you. You two had hit it off from the beginning, and everything has been going well. Since your family is out of state, you decide to fly home for the summer, and it turned out the flights were much cheaper if you waited a couple weeks. We were more than happy to host you while you waited for the flight, so you had agreed, and as a bonus got to spend more time with my son before you'd apart most of the summer.

When you all arrive from school, I'm eagerly awaiting you all and waving from the front porch. Then I see you step out of the car, and can immediately feel blood rushing to my groin. It turns out my son has very good taste. For the next couple days you two are practically inseparable, though I steal glances whenever I get the chance. However, my son receives the unfortunate news that he has to return to school for a few days to complete two chemistry labs he had missed. Since he'll be staying in a dorm for the few days, it isn't an option for you to join, which finally leaves the two of us alone.

That's the basic idea! I'm open to this ranging from consensual to nonconsensual, with either one of us instigating. My main limits are gore, scat, and snuff. Besides that, I'm open to including most things. Some of my favorite kinks are age gaps, interracial, raceplay, outercourse, bondage, forced orgasms, watersports, squirting, abuse/rough sex, stretching, toys, BWC in tight holes, cumplay, creampies, breeding, impregnation, feet, nylons, outfits, scentplay, and quite a bit more. If you're interested in playing I'd love to hear your ideas for the scene, what race you'd like to play, and your kinks/limits. Feel free to look at some old posts of mine too, they're always open!