I liked their energy, but my rental lease says I can only have one cat. Should I ask my landlord (who I have a good relationship with and a really good deal on rent), just get one of the cats without telling her, or not get one? If I should get one, which one?
If the cats are a pair: probably better to get a different one, you don't wanna break them up.
If you do get one: look up before how to properly introduce them to each other. It takes a bit, but is absolutely worth it to invest the time - the more careful you are, the more likely you are to have them be friends.