Count your blessings. That's what I'm doing each time these two smile and interact with each other. Callum, reluctant at first about his sister, has become her protector, comedian, and number one fan. Callum proudly tells anyone that will listen that she is his baby sister. Riley worships anything that Callum does. Callum talks to her in a mommy voice, which melts my heart. I am so grateful for the bond they are forming and hope that they can be lifelong friends.