You are legally her aunt through marriage.
that would be your niece or if you want to be fussy then your niece in law!
Technnically, she is not related as you do not share a common ancestor. She would refer to you as Aunt and she is your niece. Whether he is your first, second or fifth husband, his niece is your niece while you are married to him.
You are her niece or nephew (niece if female, nephew if male) and she is your aunt.
No. Your wife's niece is also your niece, but the husband of the niece is not related to you or to your wife.
Your husband's niece is your niece, too. You and your husband are her aunt and uncle. Your brother is not related to a niece of yours who is the daughter of your husband's sibling.
Your child and your niece are first cousins to each other. Your child and your niece's child are first cousins, once removed.
What is my godfathers niece to me
Your niece's brother is your nephew.
either your niece's husband, or your nephew, or your nephew in law, etc
Your son and your niece are first cousins.
Your half-brother's daughter is your niece. Your niece and your son are first cousins to each other.
Your mother's brother is your uncle. You are his niece (if you are femlae) or his nephew (if you are male).