Short answers, pulled from the story.
Vibia Sabina was the grand-niece of Emperor Trajan and wife of his successor Hadrian around 136 AD. She held the legal status of cives, which granted her son full citizen rights if he was born of two Roman parents.
Noble girls sometimes married at twelve years old while lower-class females waited until later teenage years. Public primary schools existed but evidence suggests education rarely went beyond elementary levels with individual tutoring occurring due to concerns about threats to modesty in coeducated classrooms.
In the earliest Republic a bride passed into her husband's manus becoming subject to his power. This custom died out by the first century BCE in favor of free marriage arrangements that did not grant husbands rights over wives or change a woman's legal status significantly.
Wealthy couples owned multiple homes and country estates employing dozens or hundreds of slaves. Wives managed property and business decisions when husbands campaigned abroad for years as seen when Calpurnia handled Julius Caesar's assets throughout the 50s BCE.
Ronald Syme noted daughters of nobilitas possessed real secret power through influence rather than office. Porcia killed herself as Republic collapsed following her father Cato the Younger's death while Agrippina the Younger gained political influence and public prominence as Caligula's sister.
Upon entering office each Vestal became emancipated from father's authority answering only to Pontifex Maximus. Vow of chastity freed priestesses from marriage obligations yet violation carried entombment alive penalty.