i may have someone on the hook for it right now, but in case they fall through before adds: he was one of the royal wizards brought in to serve/train with any magical royal offspring. if you're familiar with jonathan strange, he would have been a combination of natural skill as a wizard and innovate thinking towards magic. the latter is what the two bonded over initially. they fell in love, yvaine decided to marry him as there weren't any pressing alliances internally or internationally that required her signing over her hand anyway. it wasn't a scandal or slight against any other nobles, the fact he's a demi-mad scientist space case made everyone a bit nervous because oh god he's going to be consort and talking to dignitaries, that is not a thing that should happen. right now it's down that he (very predictably) accidentally exploded himself with magic a few years back. they've got two kids, one with magic, one without.