mother/father in law
Sister-in-Law
what i call my father elder brother's wife
If remarried, then step-grandma.
Your father's brother is your uncle. His wife is your aunt.
He is your Father in law.
He would be the father-in-law.
He would be the father-in-law.
You would call her your stepmother.
what i call my father elder brother's wife
what i call my father elder brother's wife
you still call him DAD
Yes, certainly it is acceptable. As a wife you can choose your husbands clothes for him.