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Sister.
brother or sister
A mistake.
Every state and region has different adoption helpline numbers. For example, the Adoption Network in Cleveland, OH can be reached at (216) 325-1000 for questions concerning adoption.
well after the age of 18 it is unlikely for them to be adopted even as a younger sister/brother. You could call her/him your younger sister/brother but it would not be official
you call her your daughter's husband's sister
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.
You would call your mother's sister an aunt.
You would call your sister's daughter your niece.
Your child would call your sister her aunt.Your sister would call your child her niece or nephew depending on gender.Your sister's children would call your child their cousin.
sister = sahodari older sister = chechi younger sister = anujathi
If you have a big sister that knows your moms phone number tell her to call mom. And wait until she comes.