I am 18 and all participants and characters must be 18

1) You're our old neighbor. You're around 65 years old, beer belly and balding. Every time my girlfriend is outside you always happen to be outside watching her, whether she's going for a swim or gardening or just sitting around. She's noticed and has told me about it, and I've jokingly told her that "you're just an old man looking for some eye candy." Today you catch her walking around the house in her underwear; a lacy bra and thong, barely anything covering her body. You sneak into our backyard to get a better view of her. The bottom of the window comes up to your waistline so there's little to no hiding.

She catches you creeping on her and she remembers what I told her, that you're just looking for some eye candy, so, to your surprise she starts showing off more of her body, to the point where you start jerking off enjoying the show.

She sees you jerking off your massive, old cock, opening up the window and leaning out to see it, so you start groping her breasts as she jerks you off. I eventually catch you two and encourage you both to take it further.

2) You're a lonely old man who loves watching my girlfriend, but she would never get involved with an old man, right? We have a nice tall fence for privacy, so you get a bold idea. Women love glory holes right? So one night you decide to cut a hole in the fence. The next afternoon you hear us both in the backyard and that's when you take your chance; you shove your huge, thick, cock through the make-shift gloryhole.

3) You're an old professional photographer that wants to take pictures my girlfriend. You invite us both into your backyard since you have a beautiful garden with a nice bench. I watch you take pictures of her, but you keep asking her to take off more clothing, more and more, seeing how far she's willing to go. As she takes off more, a massive bulge starts to show in your pants, turning her on with how big it looks. How long does it take until you're taking pictures of her with her ass up in the air with your cock inside her asshole?

any other old man prompt you can think of