This book is reading like a soap opera (or HBO drama as BenG suggested earlier)! It is interesting though. Does history believe that Livia really poisoned Augustus? Livia was the "dutiful wife" and the "ambitious schemer" according to this article.
https://www.roman-emperors.org/livia.htm
Spoiler:
The perception that Livia was ambitious for her son made it possible for her to be accused of complicity in Augustus' death. The rumor developed that she had smeared poison on figs still on a tree and then guided him to pick one of these for himself while she selected untainted ones.[[16]] Her motivation came from the fear that Augustus might retrieve from exile his one remaining adopted son, Agrippa Postumus, and that Postumus might be a rival of Tiberius. Postumus was executed shortly after Augustus died, at whose order, it is unclear.[[17]] Although it is implausible that Livia poisoned Augustus, the accusation shows how strongly she came to be perceived as championing her offspring at any cost. Further suspicion fell on her when she failed to announce Augustus' death immediately after it occurred. The military saluted Tiberius on the spot, before it became known that the emperor had died. This was necessary because, although he no longer had a rival within the family, the senate might not confirm for him the unofficial position that Augustus had held. It was better if the succession had been accomplished.[[18]] Suetonius, in a report completely different from the poisoning story, describes a loving and trusting relationship between Livia and Augustus at the end. The emperor's last words were 'Live mindful of our wedlock, Livia and farewell", and he died as he kissed her.[[19]] This detail is probably no more accurate than the poisoned figs, but it represents a second role assigned her. Her reputation was double: dutiful wife and ambitious schemer.