Your wife's sister is your sister-in-law, but you would refer to her by her first name and introduce her to others as your sister-in-law Pat (or whatever her name is.)
And after your divorce - she is your ex-sister-in-law.
Your sister in law is your husband's sister or your brother's wife.
There is no specific word for the husband of your wife's sister. If you need a phrase, call him your "sister-in-law's husband."
My wifes brother in law!
Aunt
While generally referred to as a Sister-in-law, there is no relationship.
i believe that your brother's wife's sister is also your sister in law No, I think not! But as you seem to have the hots for your brother's wife's sister, you can call her "honey" if you like.
Your wife's brother is your brother-in-law.
If you have a sister with the same dad but different mom, then she's probably your half-sister, although she would have about 25% of the same DNA as yours.
Yes.
Yes
Probably your niece-in-law.
Mother in-law