Your brother-in-law is either the husband of your sister or the brother of your husband. Your brother-in-law is not your husband's brother-in-law.
There are two ways that your husband can have a brother-in-law. In neither case is his brother-in-law also your brother-in-law.Your husband's brother-in-law may be your brother.Your husband's...
No.
Unless your brother-in-law's brother is your husband, there is no direct relationship.
Yes, you are only related by marriage. There have been marriages of sisters who marry brothers.
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