👉 In the context of family law, "eldersisterly" refers to a relationship between a spouse and their grandchild or other relative who is either a child or an adult but not yet married. In this context, elder sister means a daughter or granddaughter who has been raised by her mother and therefore shares a close bond with her own parent. The term was first used in the 19th century to describe the relationship between an aunt and her niece. However, it is now used more