A parent-in-law is a person who has a legal affinity with another by being the parent of the other's spouse. Many cultures and legal systems impose duties and responsibilities on persons connected by this relationship. A person is a son-in-law or daughter-in-law to the parents of the spouse, who are in turn also the parents of those sisters-in-law and brothers-in-law (if any) who are siblings of the spouse (as opposed to spouses of siblings). Together the members of this family affinity group are called the in-laws.
Some Australian Aboriginal languages use avoidance speech, so-called "mother-in-law languages", special sub-languages used when in hearing distance of taboo relatives, most commonly the mother-in-law.
A Mother-in-law suite is also a type of dwelling, usually guest accommodations within a family home that may be used for members of the extended family.
- The dictionary definition of parent-in-law at Wiktionary
- Audio recording of the Brothers Grimm folktale "The Mother-in-law"
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