They run completely out of cystfruit. Another mate steps up; he reasons that right now he's pretty good eating and later he won't be, and maybe Misokun will be able to grow another couple cystfruits and put them by for the baby. She eats him too.
One spren, and only one, gets pregnant. They meet another family while they're wandering around looking for forage for the animals; they manage to trade some spren straight across to improve the diversity of the next generation. The other family's herd is bigger but they won't share more than that.
One of Misokun's remaining mates tries to run off with the other family. The female doesn't want him - he's another mouth to feed - and returns him to Misokun, who tells him that she'll describe him as having been braver than that to their daughter when she hatches, and eats him.
Only one more spren manages to get pregnant. It's nowhere near enough. The last male says he knows Misokun's going to eat him sooner or later and he'd rather she kill him in his sleep so he doesn't fret about it all day, every day. She does.
In the rainy season, she lays her egg, and the herd is doing well, and she rehearses how she's going to explain the situation to the baby girl.