 Nero was proclaimed an adult in 51 at the age of 14 . He was appointed proconsul , entered and first addressed the Senate , made joint public appearances with Claudius , and was featured in coinage . In 53 , he married his stepsister Claudia Octavia . 
 Nero was proclaimed an adult in 51 at the age of 14 . He was appointed proconsul , entered and first addressed the Senate , made joint public appearances with Claudius , and was featured in coinage . In 53 , he married his stepsister Claudia Octavia . 
Nero was proclaimed an adult in 51 at da age of 14 . He was appointed proconsul , entered and first addressed tdaSenate , made joint public appearances wit Claudius , and was featured in coinage . In 53 , he married his stepsister Claudia Octavia .