The sentence wet_nurse originally referred to the nurse, the nouns into the compound verbs generate the metaphorical meaning too much care or spoiled. Feeding by the nurse from the literal meaning of understanding is clearly inconsistent with the context.
In the sentence wet_nurse refers to the original Mammy, into compound verbs by nouns, generation of metaphorical meaning a fuss or spoil. From the literal meaning by nurse nurse understand clearly inconsistent with the context.
Wet_nurse the original Nana, through nouns into compound verbs, build metaphorical meaning too much attention or spoiled. Letter from nurse nursing understanding is clearly inconsistent with the context.