Board Thread:Show-Related Questions and Answers/@comment-5963744-20130403160708/@comment-6905051-20130417055039

Henry came to Emma when he was 10. He said 10 years ago, you gave up a son for adoption.

So Henry is probably turning 11, since the events here seem to be within a few months of Emma's arrival. Since he was close to 11, he told Nael that, or maybe he turned 11 but with all the jazz going on, no one had time to celebrate it properly before.