section_path: Roles/Aggregate relatives
section_name: Aggregate relatives
paragraph_text: Aggregate relatives
  
  English-speakers mark relationships by marriage (except for wife/husband) with the tag "-in-law". The mother and father of one's spouse become one's mother-in-law and father-in-law; the wife of one's son becomes one's daughter-in-law and the husband of one's daughter becomes one's son-in-law. The term " sister-in-law " refers to two essentially different relationships, either the wife of one's brother, or the sister of one's spouse. " Brother-in-law " is the husband of one's sister, or the brother of one's spouse. The terms "half-brother" and "half-sister" indicate siblings who share only one biological parent. The term " aunt-in-law " refers to the aunt of one's spouse. " Uncle-in-law " is the uncle of one's spouse. " Cousin-in-law " is the spouse of one's cousin, or the cousin of one's spouse. The term " niece-in-law " refers to the wife of one's nephew. " Nephew-in-law " is the husband of one's niece. The grandmother and grandfather of one's spouse become one's grandmother-in-law and grandfather-in-law; the wife of one's grandson becomes one's granddaughter-in-law and the husband of one's granddaughter becomes one's grandson-in-law.
  
  In Indian English, a sibling in law who is the spouse of your sibling can be referred to as a co-sibling (specificity a co-sister or co-brother).