step-grandaughter
Your mother's new husband is your step-father and you are his step-son or step-daughter.
Your mothers husband would be your step father and you would be a step son or step daughter.
Your daughter's step-sister would be your step-daughter.
The daughter of your mother's sister is your first cousin.
no
Your mother's sister is your aunt and her daughter is your first cousin.
If a man has a daughter from a revious marraige, that daughter is the step-daughter of the second wife, and the second wife is the step-mother of the daughter.
This question is inconclusive it has no correlation or form of obtaining an answer.
Sister in law
Your mother's sister is your aunt.Your aunt's daughter's daughter is her granddaughter, and you first cousin, once removed.
There is no relationship, they share no common ancestor.
You daughter's husband's mother is your daughter's mother-in-law. The English language has no term for a relationship between you and your daughter's mother-in-law.