Soap Opera Rapid Aging Syndrome is the tendency of child characters on soap operas to age unnaturally quickly, so they can be included in more adult storylines.
This can lead to complications that even Einstein would admire. On The Young and the Restless, the character Colleen Carlton was born in 1991; 10 years later she was 14. Even more impressive, her uncle, Billy Abbott, born in 1993, reached his 16th birthday in six years. He had overtaken her, aging six years faster in the same amount of time.
I guess boys grow faster than girls.