Trying to find a book I started and apparently lost

At some point this year I started this book but for whatever reason I paused and now I can’t find it 😭

The basic premise follows the FMC who is a settler on a planet that has a native alien population. The native aliens periodically visit the village, take females to “carry their sons”. They let the women carry the babies and then come back to take them away. The FMC’s sister is one of these and i remember how sad her story is, bc she and her baby die accidentally. The FMC tries to dodge the whole mating event when it’s her turn, but some guy hunts her down and takes her, they have history but I don’t remember much after that.

I just want to know how it ends 😫😫