How many babies do we have?

Since Nash has been born Harlee has all of the sudden become his twin. She insists that she is a baby and not a "Big Durl". She cries until I make her a bottle every time that Nash has to eat. All of the sudden on Friday she was playing in her toy box and came across a pacifier. She calls it her binky. And now, the girl who refused to take a "binky" when she was really a baby, needs it all of the time. She does not suck on it she just sticks it between her teeth. When is she going to grow out of this phase? I have heard about the regression that is quite common when a baby is born but she is extreme. Good thing she is so cute! We love our two little babies!!