Senses
婶子/ 嬸子 aunt
(colloquial) wife of your father's younger brother
婶子/ 嬸子 sister-in-law
husband's younger brother's wife; a term used by a woman to refer to the wife of her younger brother-in-law
婶子/ 嬸子 auntie
a polite term for a married woman about the same age as one's mother but younger