what's the deal with Annabelle ? is she a clone or something ? Ophelia recognized her mom but... Anna looks younger than Ophelia, she's probably the same age as Brenna.
Original Annabelle ("Annabelle 1") started working at Hunter's restaurant in 1979 and they got married soon after, so let's assume she was at least 18, that would put her birth year as 1961 at the latest. Annabelle 1 died of cancer in 2002, when she would have been around 41. Clearly the new Annabelle ("Annabelle 2") is much younger than that, in fact she looks identical to a photo labeled "Summer Vacation 1981" showing Annabelle 1 at (presumably) 20 years old. (Said photo can be seen in the Chapter 13 previews.)
Now, if Annabelle 2 IS 20 years old, then that means she was born/created around 1999 (as Power Vacuum is set in 2019), which was 3 years BEFORE Annabelle 1 died. If that was the sequence of events, then my extreme long shot theory is that Hunter intended to save his wife by giving her new organs from her clone, but his plan obviously changed after Annabelle 1 died before her clone was mature enough to harvest.
Alternatively, if Annabelle 2 was born/created around the original's death, then she'd only be about 17. If this is the case, I really have no idea what Hunter's plan was, except some kind of crazy
The Boys From Brazil idea that he could recreate his wife by ensuring her clone had certain life experiences.