Rex's parents are adopting a baby, and Rex doesn't like the idea at all. Suppose her parents are so busy with the new baby they forget about her?
So she comes up with a plan. If she can be the perfect big sister, her parents will have to pay attention to her. The...
Determined to be a good big sister, Rex starts spending all her time with the baby her family has adopted, making her neighbor Pinky fear that he has lost her friendship.