Board Thread:Naruto: The Last Discussion/@comment-24098614-20150126075513/@comment-25632268-20150129174933

Umishiru wrote: I agree, she wasn't even in the |The Allied Mom Force while Ino's mother was.

I start wondering cause it is a rather popular theory among fanfiction writers that she died after giving birth to Hanabi with cause of death unknown, but there were no evidences in manga that supported this (and it wasn't that surprising considering that manga rarely showed character's parents). But now with Hinata's wedding as canon and her mother missing there I think it is likely that Hiashi is a widower after all.