As you might noted in the Bible nowhere does it condemns concubinage, Nor for that a Married woman can't have one like in these times and living in a different place not in Rome and Women no longer being property! So these days Polyamory noted "With the informed consent of all partners involved." Or whatever it is normal really. I question a woman's want to be a slave like in the past seems a light to illness!
~~~~In the Bible, a concubine is a woman who lives with a man as if she were a wife, but without having the same status as a wife. Concubines in the patriarchal age and beyond held an inferior rank—they were “secondary” wives. A concubine could not marry her master because of her slave status, although, for her, the relationship was exclusive and ongoing. Early on, it seems that concubines were used to bear children for men whose wives were barren (see Genesis 16:1–4). Later, it seems that concubines were kept simply for sexual pleasure (see 2 Chronicles 11:21). Concubines in Israel possessed some of the same rights as legitimate wives, without the same respect. https://www.gotquestions.org/concubine-concubines.html
~~~~Polyamory (from Ancient Greek πολύς (polús) 'many' and Latin amor 'love') is the practice of, or the desire for, romantic relationships with more than one partner at the same time, with the informed consent of all partners involved. https://en.wikipedia.org/wiki/Polyamory
~~~~Freeborn women in ancient Rome were citizens (cives), but could not vote or hold political office. Because of their limited public role, women are named less frequently than men by Roman historians. But while Roman women held no direct political power, those from wealthy or powerful families could and did exert influence through private negotiations. Exceptional women who left an undeniable mark on history include Lucretia and Claudia Quinta, whose stories took on mythic significance; fierce Republican-era women such as Cornelia, mother of the Gracchi, and Fulvia, who commanded an army and issued coins bearing her image; women of the Julio-Claudian dynasty, most prominently Livia (58 BC – AD 29) and Agrippina the Younger (15–59 AD), who contributed to the formation of Imperial mores; and the empress Helena (c.250–330 AD), a driving force in promoting Christianity.
As is the case with male members of society, elite women and their politically significant deeds eclipse those of lower status in the historical record. Inscriptions and especially epitaphs document the names of a wide range of women throughout the Roman Empire, but often tell little else about them. Some vivid snapshots of daily life are preserved in Latin literary genres such as comedy, satire, and poetry, particularly the poems of Catullus and Ovid, which offer glimpses of women in Roman dining rooms and boudoirs, at sporting and theatrical events, shopping, putting on makeup, practicing magic, worrying about pregnancy—all, however, through male eyes. The published letters of Cicero, for instance, reveal informally how the self-proclaimed great man interacted on the domestic front with his wife Terentia and daughter Tullia, as his speeches demonstrate through disparagement the various ways Roman women could enjoy a free-spirited sexual and social life. https://en.wikipedia.org/wiki/Women_in_ancient_Rome
