Gaius Sallustius Crispus Passienus be the end of Agrippina's villainy, for Claudius' wife, Messalina, correctly perceiving the threat from Agrippina, attempted to have Lucius assassinated, in order to ensure the succession of Britannicus, her own son by the emperor. The attempt failed, and, after procuring Passienus' death, Agrippina worked to bring about the downfall of Messalina. She then seduced her uncle, the emperor, becoming his wife, and persuaded Claudius to adopt Lucius, naming him his heir in preference to his own son. Agrippina then procured the emperor's death, placing her son, now the emperor Nero, on the throne; he soon disposed of Britannicus. Agrippina
Agrippina the Younger cousin, Drusilla's widower Marcus Aemilius Lepidus, were involved in a failed plot to murder Caligula, a plot known as the "Plot of the Three Daggers", which was to make Lepidus the new emperor. Lepidus, Agrippina and Livilla were accused of being lovers. Not much is known concerning this plot and the reasons behind it. At the trial of Lepidus, Caligula felt no compunction about denouncing them as adulteresses, producing handwritten letters discussing how they were going to kill him. Lepidus was executed. Agrippina and Livilla were exiled by their brother to the Pontine Islands. Caligula sold their furniture, jewellery, slaves