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
Claudia Acte became emperor in 54 AD, after his great-uncle/stepfather died—apparently poisoned, in the belief of contemporary historians, by his niece/wife, Agrippina, Nero's mother. A year into Nero's reign, encouraged by Seneca the Younger and Burrus, and against Agrippina the Younger's wishes, Nero took Acte as his mistress. Seneca especially was concerned that his young student would not be satisfied with his wife, Octavia, and might indulge in risky sexual exploits. This made Acte appear a safe outlet and a source of separation from Agrippina. Seneca and Burrus were on uneasy terms with Agrippina and were nervous about her political influence and