(Abby enters room)
Abby - "Mommy, can I have this cereal?"
Me - "Yup that's fine"
Will - "Don't talk to my Mommy!"
Abby - "She's my Mommy too!"
Will - "No she's MY MOMMY!"
Me - "Will, you have to share Mommy. I'm your Mommy, but I'm Abby's Mommy too"
Will - "Abby's crazy."