It's deep man. Man cat is dead, likely her husband. Her whole world is dark and dead since he committed suicide last Apri, thus the dying flowers. She wants to control things she has NO control over, thus the idea that she can finally tie down that elusive fish in the family aquarium. Dead man cat has a nice, crisp collar too. Starch I imagine
I think the cat in the blue dress (who has a pet fish) just got proposed to by the cat she's thinking of and he gave her flowers. The expression on her face is like that because the boy cat is actually her father.