Complex sentence: Emily is at first disgusted by the apparent treachery of Valentine's deeds, and she nearly betrays them all to the authorities but after helping obtain an illegal body for her uncle for medical purposes, Emily sees the error of her ways.
Split into simpler sentences: Emily is at first disgusted by the apparent treachery of Valentine's deeds, and she nearly betrays them all to the authorities. However, after helping obtain an illegal body for her uncle for medical purposes, Emily sees the error of her ways.