Board Thread:Oblivion/@comment-9716469-20130519212835/@comment-26893431-20160610201500

Bronkiin wrote: I think it's in Racial Phynology (or however it's spelt), but beast races can't breed with man or mer, I believe. There have been Dunmer Emperors/Empresses.  Though there have been many reports throughout the Eras of children from these unions, as well as stories of unions with daedra, there have been no well documented offspring. -Notes on Racial Phylogeny

I think theoretically it's possible, but the chances are.... slim at best.... even smaller if we want to say it was with Martin Septim.