What's French for "Fambly"?

As a parent, I discover that it's more fun doing homework when it's not you doing the homework.

The Boy's weekly exercise is to read his two french books and then when he's done, to write a sentence in his "cahier". It can be a sentence straight from story or the child can be more imaginative and write down a thought that was suggested by the story.

So it's a late afternoon and the Boy and I and the sister-cats are home alone having finished the pitiful little supper that we usually have when Mamma's at work and Daddy cooking (if'n you call peanut butter sandwiches "cooking"). The Boy finishes reading his story called "Ma Petite Soeur" which is about all the things a big sister does with her little sister. Je mange avec ma petite souer. Je lit avec ma petite souer. Je joue avec ma petite souer. Like that. He finishes and I start a little discussion hopefully to prompt some thoughts about the sentence he'll write. I say that since he's an only child he does all those things with mommy and daddy. Hoping maybe Daddy gets a plug in the sentence? Maybe. So, I ask. What does he think he wants to write as his sentence?

Boy: Ma petite souer est un chat!