I came upstairs and we had this conversation:
Me: Katrina, how many sisters do you have?
Me: Talia, how many sisters do you have?
Me: So, you need to be friends, and you need to have fun together, and you need to be nice to each other!
(and maybe going a little too far for a 3 & 6 year old)...
One day you'll grow up & get married & you won't live in the same house anymore & you'll miss each other! Make sure you have fun now, while you're together!
*Katrina breaks down into tears.*
Trina: But... but I want to live with you forever!!
(and that's when I told her she could.)