Board Thread:Questions and Answers/@comment-67.87.94.179-20121216031205/@comment-4190137-20130215230245

Who'sEira? wrote: Yeah, he had so many opportunities to tell her. He was just too proud to ever admit to his people that he had a illegitamite daughter!

I think that wasn't the only reason, he was too ashamed of betraying Ygraine as well...