CHIMAMANDA NGOZI ADICHIE HOW does a heart break twice? To still be immersed in grief, barely breathing again, and then to be plunged callously back into a sorrow you cannot even articulate.  How can my mother be gone forever, and so soon after my father?  My warm, loving, funny, kind, quick-witted, beautiful mother.  Unconditional supporter and cheerleader of her children, fun and funny, source of delicious sarcasm, style icon, so sharply observant she never missed a thing.  She made history as the first female registrar of the University of Nigeria. She was a permanent board member of the Anambra State…