What trait did the narrator and his wife share early in their marriage?

The
narrator begins the story by describing
himself as a docile, tender individual with an affinity
for household pets.
The narrator elaborates on his fondness for animals and mentions that he

derived a significant amount of pleasure by feeding and caressing them. When the
narrator gets
married at a young age, he is pleased that his wife shares an
affinity for animals. The
narrator's wife is also partial to domestic animals
and proceeds to fill their house with pets
by acquiring several birds, a
goldfish, a dog, rabbits, a small monkey, and a cat. Although the
narrator
has an amicable, loving marriage for several years, he begins drinking heavily and
his
temperament dramatically changes for the worse. Eventually, the
narrator's wife prevents him
from murdering their second cat and the narrator
proceeds to kill her. The narrator shows no
remorse for violently murdering
his wife and hides her body in the cellar
wall.