What are the legal (enforced by Islam) duties of a wife towards her husband's relatives/friends?
Example 1: Cooking, doing dishes, housekeeping, etc in a joint family system. Though duties could be assigned equally to all or one of them handle them on his/her own(showing kindness to others) but Is a wife, literally, responsible (in sharia) to cook for husband's mother/sister?
Example 2: There are many guests/friends who frequently visit husband. So is a wife responsible to serve them?
In a nutshell, even if it is joint family system or not, what are the duties (out of all one can think of when living with people) of a wife towards her husband's relatives/friends?
What was a married-life at the times of Prophet and sahaba? Were they having joint family system? How were they managing housekeeping? If they were having separate house for their wives then how were they taking care of their mothers/unmarried sisters?