Given his and Nero's relationship, it was not surprising when Britannicus died just before his fourteenth birthday. Britannicus criticized Nero's singing voice, and referred to his adoptive brother by his original name of Lucius Domitius. In favoring Nero, Claudius sealed the fate of his son, and perhaps his own. Ominously for Agrippina, Seneca and Burrus did not complain: either they had been bought off, or regarded Britannicus' death as inevitable given his relationship with Nero. Instead, they concentrated on growing their influence with Nero.