Eat a pickle.
Your wife's brother is your brother-in-law.
Yes
Brother in-law.
i don't care. you shouldn't of slept with my wife. you git.
i don't care. you shouldn't of slept with my wife. you git.
your brother in-law and your sister in-law
In the English language there is no difference between the wife of an elder brother and the wife of a younger brother or of a twin brother. The wife of any brother is your sister-in-law. If you are actually talking to her, however you should just call her by her name. Nicknames are fine too.
bamaridhi
YES!
If it hasn't been done already, report them to the Police.
Lover
Calling her by her name would be okay. Ask her what she likes better.