Fanfic authors can get...creative. This sometimes ends in a ridiculous, hilarious or just plain weird fanfic. Sometimes these can be the most interesting ones, sometimes they stick in your brain like a parasite.
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A Wakfu fanfic that had Yugo (main character) gets adopted by Nox and Quilby (antagonists) who got married. He was also then adopted by Eva and Dally (other main characters), giving him a total of 4 dads and one mum. It was weird, but the storyline and concept were excellent. Wakfu fans here's a link to that fanfic. https://www.fanfiction.net/s/13300443/1/Wings-Are-More-Than-We-Ever-Thought-They-Could-Be-Old-Version