Fanfiction.net is another option. There are many authors who post their works there. You might need to use the search function and type in 'Sadie and Anubis love' specifically to find relevant stories. However, the quality can vary, so it might take a bit of sifting through to find the really good ones.
You can also try Tumblr. There are often posts about fanfiction, and sometimes people share their own Sadie and Anubis love fanfiction or recommend ones they've read. Additionally, some Tumblr blogs are dedicated to certain fandoms and might have a section for fanfiction related to Sadie and Anubis.