I've been writing this story in my head for awhile. I thought someone might like it, so I'm sharing. I can't figure out how to do read mores on mobile so if someone could tell me, I'll happily add one.
In short, this takes place in a farming town with a patron goddess. The culture of the town revolves around breeding, with festivals dedicated to it, public gang bangs, stockades in the town plaza, etc. At the end of it all, the men wash the women out with their piss. Once a woman has a child, she then belongs to whoever fucked her first. There are rituals around deciding who gets to go first, but it's complicated and I'll spare you.
You've just moved to the town, although you stayed there a lot as a child, before your transition.
Strangely enough, ftms are the most fertile. This puts them in a bit of danger. The men in the town are, of course, entitled to fertile wombs. And as an ftm, the goddess blesses you with a wonderful gift: multiple men can fertilize one of your eggs, making it possible for you to belong to all of them, communally. It's also far more likely you'll carry twins, or even triplets. Whoever fucks you first doesn't really matter then, does it?
For protection, the goddess blesses ftms with temporary infertility. If the ftm dedicates himself to her, he will have to de-transition himself, but she will remain infertile. If the ftm wishes to retain their masculine body (to a point - the pregnancy will feminize your body once you go through this, fair warning. And there's no telling what the men will decide to call you...), then they will blessed with fertility.
Ftms are very hard for the men in town to resist. Especially the farmers and the ranch hands. It's like they feel entitled to you, because you knew them growing up. All sorts of ages - the oldest in his 70s. They love to call you their little girl. Remind you of who you used to be. They humiliate you, beyond joyful to put you in the place they believe you belong in.
While you're pregnant, with the sperm of all the men in the town, each night they all rub your belly, before the fucking begins. They laugh at you when you cry about the pregnancy making you dysphoric. They squeeze your swelling tits, sucking on them, drinking your milk. (The goddess blesses you with yet another thing: your breasts begin to swell as soon as you're inseminated, and they produce milk only a week later). They finger blast your dripping cunt until you piss all over each and every one of them, and then you're their holes, to use however they please.
But, the sex becomes gentle, loving. You feel yourself grow attached to them. You'd do anything for them. And you'd do anything for their cock.
Just imagine how they'll use that power.