Assured that a woman after having parted with her virtue will hesitate at nothing, he lured her on to thoughts of marriage, of a share in sovereignty, and of her husband's destruction
Ann Book IV Chapter 3: Murder of Drusus. Preliminaries
By Sejanus

She, the niece of Augustus, the daughter-in-law of Tiberius, the mother of children by Drusus, for a provincial paramour foully disgraced herself, her ancestors, and her descendants, giving up honour and a sure position for prospects as base as they were uncertain
Ann Book IV Chapter 3: Murder of Drusus. Preliminaries