This question assumes as true something that is not true, that a man's sisters-in-law are always in competition for his attention. That may be the case in some instances but is by far not usually the case.
It is not true that in most families the sister of the husband and wife of brother are always at loggerheads. As with all human relationships, sometimes people don't get along, but that is not tied to specific relationships strongly enough to say "in most families."
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.
Your husband's brother - is your brother-in-law.
Your husband's brother is your brother-in-law.
The husband's brother is a brother-in-law to the wife. The wife's brother is a brother-in-law to the husband. However, the husband's brother is not related to the wife's brother.
Your husband's brother is your 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 brother-in-law may also be the husband of his sister. In that case he is the husband of yoursister-in-law, but that does not make him yourbrother-in-law.
You are not related to your sister's husband's brother. However, her husband is your brother-in-law and his brother is your sister's brother-in-law.
Your husband's big brother is your brother-in-law. If your husband has a little brother, he is also your brother-in-law.
Your husband's brother, senior or otherwise, is your brother-in-law.
No. Your husband's brother-in-law would be your brother or the husband of your husband's sister. Your sister is your husband's sister-in-law. Your sister's husband is your brother-in-law but the English language has no term to describe a relationship between your husband and your sister's husband. In everyday English usage, however, your sister's husband is referred to as your husband's brother-in-law, yes. But it isn't exactly correct.
Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.Cleopatra's second husband was her youngest brother, Ptolemy XIV.