This must happen with all siblings, but with twins it’s constant. Take a small child’s need to be right, her desire to be good, splash in a good dose of competitiveness with her sister, and add a healthy dollop of identity confusion and you’ve got the tattler olympics going on. Every day.
“Mom, Lilly’s sucking her finger again!”
“Mommy, Dulce put the sticker on the couch!”
“Mama, tell Lilly to get away from the TV.”
“Dulce, you’re breaking it! Mama, Dulce is breaking it!”
They want to hear not only that they are good, but that their counterpart is bad. It’s not enough for them to behave. They need their twin to behave or pay the price.