The neighbor lady?
It sooooo does not help that the neighbor lady was mentally ill as well - sheesh! Or was the neighbor lady just a sleep walker?
I may have missed parts, but I saw her in the beginning go out to her mail box and Angela says she believes the woman is an angel. The next time I see her, she's at the mail box and Angela runs over and asks how to get to heaven. The woman seems oblivious and starts rambling about taking a sandwich to someone in the cellar.
Angela follows her back into her house demanding to know about heaven. The woman gets back into bed and seems to "come to" when Angela is shaking her and asking her about getting into heaven. The neighbor lady then wakes up and asks who Angela is and to get out, like she had only been sleep walking.
Where there any other scenes of the neighbor? If these are the only two, she's just a sleepwalker and not NECESSARILY mentally ill.