Your husband's sister's child is your niece, and you are her aunt.
It's your cousin.
My brothers-in-law are my sisters' misters. I don't know which of the sisters' husbands he is.
Never was he on government welfare. He did have to rely on the welfare of his mother's sisters and their husbands after his father and mother both died while he as a child.
Well, it depends how close you are to your husbands family. If you really want to know they are cousins-in-law.
Your nephew's first cousin may or may not be related to you, depending on how the cousin is related to your nephew. Your nephew's cousin may be your child, or the child of one of your brothers or sisters. Your nephew is related to you by being the son of your sibling. That sibling has a spouse who may also have borthers and sisters. The children of any of those brothers and sisters are also your nephew's first cousins, but are not related to you.
spain
None of the Cimorelli sisters have a child.
Condoleezza Rice is an only child, so they are definitely not sisters. There is no indication that they are related at all.
your second nephew
The word sisters is a common plural noun. It needs no apostrophe.I loved my sisters.When sisters have possessions or belongings, it needs an apostrophe.I loved my sisters' letters and cards.My sisters' husbands were teachers.
Selena Gomez is an only child. Her mother remarried when she was younger but has no step siblings.
sisters are people who are related