The "full" aspect of this story implies a complete arc. It’s not just about them coexisting; it’s about them becoming a support system for one another.

The "chicken soup" is not a product. It is the act of choosing kindness when it is not deserved. The "full" is not a runtime. It is the moment you realize your stepsibling defended you to a bully, or saved you the last slice of pizza, or simply sat with you in silence when you were sad.