Your sister's father's wife's son's cousin's father+in+law is your which relation ?

Your

Sister's

Father's

Wife's

Son's

Cousin's

Father in law

is your UNCLE !!

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

What relation is your aunt's daughter's brother's wife to you ?

What relation is your son's uncle's aunt's brother in law's brother to you ?

What relation is your uncle's son's brother's brother in law to you ?

What relation is your cousin's father's son's father in law to you ?

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