Your husband's sister's kids are referred to as your nieces and nephews by marriage. More specifically, you can call them your "nieces" if they are girls and "nephews" if they are boys.
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.
Well, it depends how close you are to your husbands family. If you really want to know they are cousins-in-law.
No. An Uncle is the brother of either your Mother or Father. You're kids may call him 'uncle'
spain
you call her your daughter's husband's sister
Your brother would call your husbands sister by her first name. Or, "my (sibling's) sister in law.
your second nephew
you call your parents sisters aunty
They are sisters in law.
Not really
None of the Cimorelli sisters have kids. Christina, the oldest, is only 23.