by Upwind
It was a novel idea and a bit of fun the first time, but in no way did it deserve a second chapter, let alone a 4th one!!!
Enough already. Please stop now and may be you can try your hand at another story?
I agree with the previous comment that the story is starting to grow stale, but I think you could keep it fresh by having them do new things now that they have the fertility goddess supporting them. You could do multiple breast/genital growth or pregnancy, or start corrupting the entire village.