Son Coker marries grown-enough daughter of formerly Widow Lee and has many children with her. Widow Lee becomes my step-GGGGGG Grandmother. But Widow Lee also becomes my for-real GGGGGG Grandmother.
The new little children of Papa Coker are half brothers and sisters of Son Coker and half b & s of his wife, the daughter of Widow Lee. Son Coker's children are the nieces and nephews of Papa Coker's new little darlings, but they are also half b & s to them. Right?