Hmmm. What do I Say?

Well my son most likely met my one of my brothers for the first time last night when my Mother visited him.  I can't remember if I ever told my son about him.  We already had a talk about my Dad and why we didn't talk, but I think my brother never came up.  Hmmm.  I know my son is naturally curious which is a good thing.  So I am thinking of what to say.   It is hard when kids are young.  To explain these dysfunctional family dynamics to a six year is always a challenge.