Usually there are a few other temporary stray kittens in the apartment, but I never saw any father cat there before. Today Susan and her kittens are under the stove, and Susan keeps hissing at a big tiger-striped tomcat crouching under the sofa. He turns his head away from her and looks like he never intended to get mixed up with family life. For a stray cat he's sleek and healthy-looking. Every time he moves a whisker, Susan hisses again, warningly. She believes in no visiting rights for fathers. Kate pours me some tea and asks what's doing. "My pop is full of hot air, as usual," I say. "Takes one to know one," Kate says, catching me off base. I change the subject.