Agrippina the Younger
Agrippina the Younger was Livia's great-granddaughter and appears to have inherited her demanding parenting style from her. Agrippina wed her uncle, the emperor Claudius, and brought her son, the future emperor Nero, to the Imperial Palace. For the first few years of his reign, Nero depended on his strong mother until he started to rebel against her rule. When his killers arrived at Agrippina, she gave the order for them to stab her in the womb that had given birth to such a horrible boy.
Britannicus, Claudius' own son, was his obvious heir. Nero, who was older than the emperor's son, had Agrippina's backing, which his stepbrother did not. Nero assumed the emperor after Claudius' death, which Agrippina was suspected of having a hand in, and Britannicus was relegated to the background until his own strange demise.
During his early rule over the Roman Empire, Agrippina assisted, counseled, and consulted Nero. Although he was married to Octavia, Poppaea Sabina was the object of his affections.
Agrippina disapproved of the relationship, and Nero requested that his mother refrains from meddling in his private affairs. On his second effort, he was successful in killing her as he had intended.