If you are referring to Exodus 4:21-26 in King James Version then it is because his wife had to perform a circumcision of their son and she "cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me."
Zipporah was the wife of Moses.
Husband call wife like Tarzan call Jane. :U
Unless you are in a polygamous marriage, you are your husband's wife, so you would call her your mother.
A husband's stepfather is a step-father-in-law to your wife, but, if your wife is comfortable she can still call him dad and if not, she can call him by his first name.
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."
Your Brother in law's wife
The sister of your husband is your sister-in-law.
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."
Nephew.
Your husband or wife, if you have one.
Trouble.
A married couple.