The wife’s elder sister is called “sister”, “eldest aunt” or “eldest sister-in-law”. The husband calls his wife’s younger brother “brother” in person, and calls him the same name as his wife. When addressing him in person or in writing, he is called “brother-in-law” or “younger brother-in-law”. The husband calls his wife’s elder brother “brother” in person, and calls him “eldest brother-in-law” or “eldest brother-in-law” in person or in writing. The husband calls his wife’s younger sister “sister” in person, and calls her “younger sister-in-law” or “younger aunt-in-law” in person or in writing.
What is your wife’s sister’s name?
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