reading your report, I have an idea, but I don't know if it can work.
go to the village around the pyramid, which is in the desert.
enter the pyramid, go through the railing bridge.
then, with Leah, pick up the spirits until her belly swells to the maximum and she drags along the ground.
so, leave the pyramid the same way, an animation of a mist will pass, where your belly will return to normal along with the power of total fertility.