For reference, here's some quotes from the book where a trans woman is hiding from murderous TERFs, but also gets turned on by them:
The tattooed woman said something that made her retinue laugh. Fran watched her lips move, watched the play of muscles under her smooth face as she smiled. A cold thrill went up her spine. God, you don’t need to have a wet dream about a fucking gender-essentialist neofascist. She squeezed her eyes shut, nipping in the bud her imagination’s little spurt of latex tight against pale skin and thighs divided into lickable quarters by garters edged in delicate black lace, of a hand on the back of her neck squeezing tighter and tighter until—
She was tall, maybe five-ten or more. “When we catch you—” A brief but vivid fantasy of the nose-ringed girl trailing a riding crop’s cool leather keeper over her clenched and trembling ass shoved its way eagerly into Fran’s imagination.
After she shot Beth, I thought about what it would be like to fuck her. What the hell is wrong with me?
Had she fantasized about Teach, too, when they’d spotted her through the trees? She had. Garters and heels and the soft leather whisper of a flogger’s head over bare skin. Those cold, unblinking eyes. She swallowed and sat up straight, forcing herself to pay attention.
The context is that a virus called "T Rex" breaks out, and infects everyone with a certain level of testosterone in their system. All men turn into gibbering monsters who live only to rape and murder. Trans women whose testosterone was suppressed are not impacted by this virus, because their testosterone isn't high enough - but must constantly work to suppress their testosterone and take estrogen lest they turn too, which is achieved by hunting down the men and eating their testicles - they do extract estrogen in a lab or something, but they flat out cook and eat testicles too which somehow also works:
They sat on the car’s moth-eaten floor carpeting, dangling their feet in the grass pushing its way up through the pavement, and ate cold balls from the foam case in the duffel. Fran chewed the raw, springy flesh gingerly. She scratched her own in sympathy as she choked down the best source of estrogen five years of reckless experimentation and desperate medical-library raids had been able to turn up. She could practically hear Indi’s voice as she ate.
Just pretend it’s one of those fancy chocolates with the gold foil. You know. A Ferrero Rocher.
She couldn’t remember what Ferrero Rochers tasted like, and the pungent, gamey stink of the testicle coated her tongue like oil. How many of these things had she choked down since the last of the estradiol had oxidized? Hundreds, probably. She’d eaten more balls than she’d ever sucked cocks. The thought made her unexpectedly blue. Or maybe it was just the humidity. Sweating always made her sad.
Fran plucked the balls out of the little plastic dish she’d set by the electric range and dropped them into the pan, angling it with her other hand to make sure they got an even coating of the melted butter. They sizzled, a sound like dozens of small mouths chewing at once. In the living area off the kitchenette, Beth was teaching Robbie how to play Screw, both of them slamming cards down on the coffee table and slapping at each other’s hands. Fran took a pinch of salt and sprinkled it over the testicles before turning them with a chopstick, exposing their seared and caramelized undersides.
When did I become a person the quality of whose days is determined by whether she eats balls raw or fried?
TERFs roam the land trying to kill trans women, mostly because the main TERF was jealous of her trans sister being affirmed by her mother, but also any pre-puberty boys were castrated by the TERFs and forced to dress and present as women (and the TERFs have sex with them, but don't see them as "trannies in the dangerous way").
However the protagonist trans women still have their balls for some reason (which means they nearly turn into zombie monsters), although the TERFs do accept other trans women who agree to castration and to serve the matriarchy, so in theory they could just cut their balls off... but then there's also a viral video of a trans woman turning into a horrible zombie directly after bottom surgery, so it's not really clear exactly how that works. The TERFs also force trans woman to cum to run breeding facilities where they try and conceive more girls (if a woman gets pregnant with a boy, the boy will eat its way out of the woman).
Notably women who go through menopause or have PCOS also turn into the horrible zombie monsters, which is how JK Rowling dies in the book:
Zia leaned forward into the firelight, grinning evilly. “Fuck Steve Martin. Have the new girls heard what happened to the Harry Potter lady?”
Most of the women around the fire groaned, though a few straightened up attentively. Beth shook her head, blushing at being made the center of attention. Her bruises were fading from dark purple to brown and yellow, as though someone had spray painted her for autumn camouflage. She sat leaning against Indi’s side, hands in the pouch of her hoodie. It felt so fucking weird to sit on the rocky beach as the stars came out, swapping stories about what had happened to the world’s celebrities when the big one hit. It felt like the end of the world was prowling the limits of the firelight, waiting for the embers to go out.
“Okay, so, first off she ended up being a crazy TERF, like, super intense. When the news about t. rex started, she hired a bunch of woman contractors—remember Blackwater, those sickos in Iraq? She had them all up at her castle in Scotland with a bunch of her rich girlfriends and they were all drinking wine, kissing her ass, planning out how to rebuild society. They had their sons, husbands, whatever, in some kind of hermetically sealed guest house she’d had built special in case of germ warfare or something.”
Robbie sat down next to her. She hadn’t seen him coming down the beach. Her stomach clenched as he said something to the older woman, June, on his other side and then turned to listen to Zia’s story. He hates me. I had a chance and now it’s done and he hates me and I have nothing. I have nothing at all.
“So, they get exactly one day into their girl-power retreat and then it turns out one of the friends has PCOS and doesn’t know it. She flips in the middle of the night and starts ripping into the other guests before someone knocks over a lamp or something. I guess they’d been stockpiling diesel and kerosene.” Zia mimed an explosion with her hands, fists coming together before unfurling into spread palms. “Anyway, the Blackwater bitches who survived the blast looted what was left of the place and bugged out. Left everyone else to burn alive, and finally the whole castle collapsed. Real Masque of the Red Death shit.”
and they actually buy the distilled estrogen that the trans women get from cutting the balls off men. There's also extreme amounts of sex, including a couple having sex next to a person who'd just been gang raped by zombie men and stuff like that, and even when the sex is not the result of rape or some abusive dynamic it's still really fucking weird:
Slippery velvet cunt. Sticky. The zipper’s hiss as it bared flat white belly and shaved mound. Black fabric slithering over pale skin. Pooling on the silk. Long nails stroked her scalp. She kissed the pink bud of Sophie’s clit and imagined sucking it out of its hood of tender skin, drawing it like a snail from its shell into her own body where it might take root and change, drawing her cock up into her flesh, parting the soft curtains of her sex. She drank from Sophie. Greedy mouth on fluttering lips.