Assertion: stepbrother | /r/HasProperty | britannicus
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Source sentences:
text: However, Nero's "conduct became far more egregious" after his mother's death.:22 Miriam T. Griffins suggests that Nero's decline began as early as 55 AD with the murder of his stepbrother Britannicus, but also notes that "Nero lost all sense of right and wrong and listened to flattery with total credulity" after Agrippina's death.:84