Sinner and Seeker (An Amazon Planet Anthology, Stories 11-15) - Amazon Planet, #15.5

It felt like a hundred lifetimes ago that Maggie Kennedy had awoken in that alien chamber, naked, restrained and suspended from the ceiling. A hundred lifetimes ago that she learned she'd been brought to the planet Amaza as a pleasure servant, known there as a Doula, for the dominant race of Amazons there. A hundred lifetimes ago that she'd become the High Doula to the Amazon Queen, and learned that their society, their people, ineed life in all the universe was in grave danger.
A hundred lifetimes since they'd left their glittering capital city in search of the Futanari, the other race on that planet who'd fled the Amazons' company in the wake of terrible ancient crimes... She'd found them intimidating at first, those seven-to-eight-foot-tall aliens that had the appearance of beautiful human women, albeit with one, very important distinctly non-feminine anatomical detail...
How could she not find them intimidating at first, especially once they were undressed? But now she only loved and cared for them, considering her duty as their sexual servant to be a sacred one. Maggie had come to love her Queen, and believed wholeheartedly in their quest to find the Futanari. She'll do anything to help them complete their mission and cause life to blossom once again across the universe. At least...
Maggie believes she'll be willing to do anything, even as it remains to be seen how far she'll be asked to go... This is a 35, 000 word short story anthology, stories eleven through fifteen in the Amazon Planet series. All of these stories are available as single purchases as well. The story contains graphic depictions of sexual acts and adult situations, between alien Futanari, who mostly have the appearance of very tall human women, and evolved human characters, who still have the appearance of humans.
All characters depicted are over the age of 18 and all engage entirely consensually. The author respects all LGBTQ+ people, and people of all walks of life.