[ULPIANUS libro quinto ad legem Iuliam et Papiam. ] §38.10.6.prLabeo scribit nepotis ex filia mea nati uxorem nurum mihi esse.
[ULPIANUS in his fifth book on the Lex Julia et Papia.] Labeo writes that the wife of a grandson born to my daughter is a daughter-in-law to me.
§38.10.6.1Generi et nurus appellatione sponsus quoque et sponsa continetur: item socri et socrus appellatione sponsorum parentes contineri uidentur.
By the term "son-in-law" and "daughter-in-law", the betrothed man and the betrothed woman are also included; likewise, by the term "father-in-law" and "mother-in-law", the parents of the betrothed couple seem to be included.