They are your biological parents.
The son is the maternal grandson of the mother of the father.
The second wife to your father if she is not your mother is called your step mother .
She is your father's aunt and your great aunt. You would be her grand niece.
Your mother's sister's children are your 1st cousins.
in law sister in law father in law mother in law
In most cases, your brother's father is also your father. If your brother is actually your half-brother, and you have the same mother, then your brother's father is either your stepfather or is not related to you at all.
No, they're not blood related. They'll only have a relation if it has to do with the will of the person.
There is no word for this in English. Spanish has "consuegros" and Yiddish has "machatunim."
No, your father's brother's son is your cousin. Unless, you have the same mother in which case you would be both cousins and siblings.
This could be a) your aunt on your mother's side (i.e. your mother's sister) b) a wife of an uncle who is your father's brother (an aunt by marriage).
A relation on your father's side of your family is called a paternal relation.
Father or Mother