Wait a minute ...

My kids were fighting again.  Pulling hair, calling names, hitting each other.  It happens.

Me.  You two just can't seem to get along.  You obviously don't want a sister.  I'm going to have to give one of you away.  You have to pick, and agree on, which one gets a new family.  

L.  Her.

K.  [points toward her sister]

L.  Wait.  Do we get a new dad?

K.  That might be good.