Your brother's grandmother's grandson's mother is your which relation ?

Your

Brother's

Grandmother's

Grandson's

Mother

is your AUNT !!

What relation is your brother's aunt's niece's daughter in law to you ?

What relation is your aunt's sister's mother's husband's son's niece to you ?

What relation is your cousin's brother's uncle's son's wife to you ?

What relation is your cousin's mother's daughter's sister to you ?

What relation is your father's wife's sister's cousin to you ?

What relation is your aunt's sister's cousin's mother to you ?