Get the great-grandmother-in-lawmug. 
Get the step-great-grandmother-in-lawmug. Spouse's great-great-great-grandmother.
My great-great-great-grandmother-in-law is a good person.
by JAMP12 September 21, 2021
Get the great-great-great-grandmother-in-lawmug. 
step-great-grandmother.
by Simaduria July 27, 2024
Get the step-great-grandmothermug. Great-great-great-grandparent's mother.
great-great-great-great-grandmother
by Simaduria July 26, 2024
Get the great-great-great-great-grandmothermug. 1. The grandmother of one's stepmother or stepfather.
2.The stepmother of one's grandmother or grandfather.
3.The mother of one's grandmother's husband or grandfather's wife; but not their biological great-grandmother.
2.The stepmother of one's grandmother or grandfather.
3.The mother of one's grandmother's husband or grandfather's wife; but not their biological great-grandmother.
by Stepman December 11, 2017
Get the Step Great-Grandmothermug.