Sisters in Arms

Me: Maura, please sign this card for Corbyn's Birthday.

Maura signs the card. Schatz picks up the card to play the music one more time.

Maura: That's not yours. That's for my cousin.

Schatz: Not your cousin. He's my cousin.

Maura (insulted): He's my cousin, too!

Schatz (to me): Tell her he's my cousin.

Me: He's your cousin, but he's Maura's cousin too. You share cousins because Maura is your sister.

Schatz: Okey-Dokey. (Opens the card to play the music one more time.)