Your husband's sister is your "sister-in-law". This means you are related to her "by law." Whether you should consider herhusband to be related to you is a matter of opinion, but most people in the western culture do not.
Many widows who have not remarreid and who are close to their sisters-in-law continue to consider them to be sisters-in-law. If the widow remarries, that can create a more complicated situation and they may be called "former sisters-in-law," or "the sister of my late husband."
The children of your husband's siblings are your nieces or nephews. Their children are your great-nieces or great-nephews.
My brothers-in-law are my sisters' misters. I don't know which of the sisters' husbands he is.
No. Neither is your cousin-in-law, or her sisters. In-laws are not blood relative (i.e., members of your family or lineage) therefore anyone related to an in-law is not a relative.
This question makes unfounded assumptions about sisters' hate for in-laws. Some sisters may hate of their husband's sister, but many do not. It is misleading and incorrect to presume that all sisters hate or do not hate one or another type of in-law.
Well, it depends how close you are to your husbands family. If you really want to know they are cousins-in-law.
spain
sisters in law
WHAT DO YOU MEAN? It's your husbands SISTER. She should be treated GREAT. UNLESS she treats you bad, then. Just grin and bare it, it will tick her off. Then converse about it with your spouse.
Both sisters-in-law should discuss the situation with your husbands. Talk about how they treat their sister and that maybe she needs a different type of support if she will have a good life as an adult. The problem may not be the sister.
She is your sister-in-law.
Let's see if we can unravel this. Your sister's husband's father's brother is your sister's husband's uncle. The uncle's daughter is your sister's husband's cousin. There is no relationship to your sister, unless your sister wants to call her a cousin-in-law. To break it down to its simplest terms: She is your brother-in-law's cousin and no relationship to you.