Complex sentence: Near the end of the novel she recognizes that Duncan has been metaphorically feeding upon her to compensate for his lack of vivacity, and she consequently bakes him large cake designed in the form of a female.
Split into simpler sentences: Near the end of the novel she recognizes that Duncan has been metaphorically feeding upon her to compensate for his lack of vivacity. She consequently bakes him a large cake designed in the form of a female.