I remember reading Star Wars fanfic. It was big (bigger than standard Star Wars books) and was written in a serious language (although I couldn't stop laughing). I was never able to finish it, but I can tell important points from the beginning:
Leia gave birth to Jabba's child after the events of Return of the Jedi. It was explained in great detail how Hutts and Human cell/DNA mixing takes several years.
There was also a photo of the child. Its body shape was that of a Hutt, but it had a head of a human and skin was smooth.
Birth of the child also created a dispute between Han and Leia. Han even left Leia after that (BTW, I read it long before The Force Awakens was released).
Can you please identify this fanfic?