User blog comment:BackToTheFuturama86/Jack Torrance vs Regan MacNeil. Epic Rap Battles of Villainy Season 1/@comment-5393732-20151006212209/@comment-3401602-20151006231952

I'm pretty sure there's heavy support in that theory as well, Flats. Iirc the mother was a childbook writer earlier in life and wrote Mr. Babadook

Also her hand is all ash covered after she burns the book so she could have put it back together once more

And she always seems to envision the Babadook as her husband during extremely stressful encounters