some other details I forgot to mention:
-Said that Theresa believed that Suesan was a witch who was casting spells on her that caused her to gain weight.
-When Shelia was hog-tied in the closet, it was dark and excruciatingly hot. When Theresa left the place for a few minutes, Terry opened the closet door and Shelia's head literally fell into her hands. Terry heard her mother returning and put Shelia back in the closet since Theresa had told everyone not to open it. Shelia could be heard attempting to climb shelves in the closet in order to escape, but they didn't support her weight and she fell. I don't know how long she spent in there, but it may have been as long as 5 days. I also don't know if she died of starvation, thirst, or hyperthermia or what since any of them are possible.
-not mentioned in the episode, but Theresa also regularly threw knives at her children.