When Yuuki's kids refer to Kaname as their other father, is that literal? Is the black haired girl Kaname's daughter from the time he and Yuuki had sex?
How long did Zero live? Do we know if he can live for 1000s of years if he's drinking pureblood blood? I'm trying to figure out if Yuuki went on living alone 5000 years after Zero died OR the two lived together for 5000 years and when Zero died, she went ahead and gave her life to Kaname.