Mittle Melissa Not Little Melissa

My favorite memory from when I was a child was how my very own sister forgot my name. Up until we were about five my dear, dear thithter (Don't mind that, just some little sister fun consisting of me making fun of my sister's newfound lisp due to her retainer) called me Sissy. 
While we were in preschool, "Melissa" was a name unknown to Zoey. She heard everyone call me it. She saw me right it down. There a million obvious signs that my name was Melissa. Yet somehow, Zoey did not know tat I was named Melissa. 
She called me Sissy because I am her sister. Whenever someone else called me "Sissy" Zoey blew up at them. Only Zoey could call me Sissy, anyone else was due for a death by toddler. 
This was my favorite memory because to me, it's like a little inside joke between me and Zoey. It was our thing and no one else's. No one could break this bond between us. I hope we never, ever drift apart, but if we ever do we will always have Sissy. That is something we'll forever hold.