In-Laws

Q: How should a wife treat her husband's parents? Please guide.

Q: Is it allowed to call one's mother in-law and father in-law as 'ammi' and 'abu'?

Q: Is it mandatory for a wife to serve her in laws like doing their household work? Is it a right of a wife to live separate from her in laws? What are the teachings of Islam?

Q: I am 32 years old and I am married with 2 kids. My father in law and mother in law are divorced. After the divorce my  father in law remarried. His new wife was always kind and caring towards myself and my kids. Now that my father in laws wife and me get along, my own mother in law has an issue about it and she hates that my father in law's wife is a good person. She doesn't want myself and my kids to be good with her. I want to know if its wrong to be good with her or if its right to listen to my mother in law?

Q: Does the daughter in law have to observe purdah in the presence of the father-in-law after her husband has died? (Meaning the father-in-law was the father of her late husband)?