If your sister-in-law is your spouse's sister, her brother is your spouse's brother and therefore is your brother-in-law, or perhaps your husband.
If your sister-in-law is the wife of your brother, her brother is your brother's brother-in-law but is not related to you. The English language has no relationship term for the brother of your sibling's spouse.
Your sister-in-law's husband may be your brother. If so then the brother-in-law is either your husband, in which case the daughter is your daughter; or the brother-in-law is your brother, so the daughter is your niece or the brother-in-law is the brother of another sibling's spouse, in which case the daughter is still your niece If your sister-in-law's husband is not your brother, then he is not related to you and his brother-in-law's daughter is not related to you.
There are two ways you can have a sister-in-law. In one case, her sister is also your sister-in-law and in the other she is not.
Your sister-in-law can be the sister of your spouse. Then your sister-in-law's sister is either your wife or is also your sister-in-law.
Your sister-in-law can also be the wife of your brother. In that case, your sister-in-law's sister is not related to you.
he is no relation.
You sister-in-law is your son's aunt. the relationship consider age diff.if she is lower age what is his relationship.
Your sister's daughter and your son are first cousins to each other.
Your brother-in-law is either the husband of your sister or the brother of your spouse.Where your brother-in-law is the husband of your sister, there is no relationship name in the English language to describe his brother's relationship to you. However, in that situation your brother-in-law's brother is your sister'sbrother-in-law.Where your brother-in-law is the brother of your spouse, his brother is also your brother-in-law.
The relationship of the sibling of your sister-in-law or brother-in-law to you does not have a name in English. You could call them your brother- or sister-in-law if you want, or you can call them the brother or sister of your brother- or sister-in-law.
Your brother's wife is your sister-in-law. The English language has no relationship term for the brother of your sister-in-law. He is not considered to be related toyou, although he is your brother's brother-in-law.
He had a good relationship with his sister
You sister-in-law is your son's aunt. the relationship consider age diff.if she is lower age what is his relationship.
Your husband's sister is your sister in-law.
Your Mother's Sister Is Your Aunt.
Your sister's daughter is your niece.
she is his younger sister
Your sister and your wife's sister are not related to each other.
There is no relationship at all.
Your sister's father-in-law is not related to you and neither is his sister.
Your sister's husband is your brother-in-law.
Your father's sister is your Aunt.
There is no relationship. You do not share a common ancestor. The connection is simply through marriage.