Mexican or not, your wife's brother is your brother-in-law. His wife is not related to you, although she is your wife'ssister-in-law.
You're wife's brother's wife is your sister-in-law.
Your sister in law is your husband's sister or your brother's wife.
She would be your step-sister
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.
I would not touch this matter unless you are interested in self-destruction.
Yes.
Yes
Probably your niece-in-law.
While generally referred to as a Sister-in-law, there is no relationship.
granddaughter
Shwe would be your sister-in-law.
Your sister-in-law.