Tell her anywhere she's okay with
From Create Your Own Story
Her eyes widen. "Oh, you mean, like on me?" She bites at her bottom lip. "That's okay, I guess." She nods a little, watching you stroke your cock, then rolls onto her stomach. "I want you to do something for me," she says. You notice that she's tucked her arm under her self, and as you get up to give her a little room, you realize her fingers are between her legs, and she's masturbating as well.
"Anything," you say between heavy breaths.
"Pull my panties down just to the bottom of my butt," she says. You do exactly that, pulling them down and tucking the waist band just under the globes of her ass. "I want you to cum all over my ass. Don't even ask why. I just like it. But don't do it until I tell you to." You agree.
You watch and stroke yourself as Melanie works herself through her panties. You can see the tips of her fingers rolling her clit around through the panties, and you get harder and harder. Listening to her moan and watching her raise her ass up as you jack off over it, you keep having to slow down to keep from cumming too quickly. Her breath gets heavier and heavier, and she raises her ass up until she's on her knees. Her cheeks spread open, and there in all it's glory is the pinkest, tightest little asshole you have ever seen.
"Cum on my ass!" She screams, her words urging you on. "Cum right on my asshole!"
You're caught off guard, but it's too hot to stop. You pound away at yourself as you watch Melanie shake with orgasm. You shoot a stringy load over her cheeks, then bend at the knees and nestle the tip of your cock against her backdoor. She groans loud into the cushion of the couch as you pop out another shot of jizz over her buttonhole, and then a another, and another. It drips down her crack, into the recess of her panties, and you can only imagine your cum is now being mashed into her pussy as she masturbates.
You both collapse back down onto the couch. "This..." she says breathlessly. "...this is a one time thing, okay?" You nod in agreement, though you hope she might change her mind. She kisses you on the cheek and falls back onto the couch, hand still between her legs, ass still covered with your cum. You go into the bathroom, fetch a hand towel, and clean her up as best you can. She's already asleep, so you lie down next to her and drift off into dream land.
