She's technically your aunt-in-law. You obviously wouldn't actually call her "Aunt in law Sally", so you should just refer to her as "Aunt Sally."
I call my grandma's aunt, Great Aunt. Maybe that's what you call her, but she is of course your great-great-aunt.
Your father's aunt is your great aunt.
Your father's aunt is your great aunt.
He would call your aunt his great aunt. In informal situations, great aunts are sometimes called, simply aunt.
He would call your aunt his great aunt. In informal situations, great aunts are sometimes called, simply aunt.
puppy
You don't call your brother's sister your aunt. Your brother's sister is your sister, or you. Your aunt is the sister of your mother or father.
it is your great aunt
Your father's half sister is still your aunt because she has some of the same genes as your father. Call her Aunt _________.
In English, you call your maternal uncle's wife "aunt." It's not rocket science, honey. Just like how you call your paternal uncle's wife "aunt," keep it simple and call her the same thing.
Your mother's sister's aunt is also your mother's aunt. So she would be your great aunt.