Does EY realize that Alecto and Amycus are siblings? He said that these children lost both parents.
And if Alecto has a child, then either the child is illegitimate, or Alecto kept her last name after marriage, something that no woman does in canon, and that no Witch does in MOR (only the Muggle Evans-Verres couple hyphenates). I don't take Alecto Carrow for a tradition-defying feminist.
So I conclude that this a slip-up.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 117.
Plans for next chapter release:
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)