Call me crazy, but somehow I always thought of sovereigns' spouses as a subset of champion units, which naturally made me expect to see my sovereign's marriage as a very special case of recruiting a champion. Lo and behold, in 0.291 it seems to be a simple random event, and when playing as Lady of Tarth, the spouse seems to be caught between being a card on the Dynasty screen and a unit lost at sea on the main map.

The husband lost at sea thing seems like just a bug to me, but being bluntly informed that I, a sovereign channeler, suddenly have a spouse seems like either a placeholder that could have used some advanced discussion or a very annoying design choice. I'm not a competitive TBS player, but when the dynasty stuff first came up, it seemed like a great idea for a non-conquest win type. If marriage(s) and offspring are inevitable for every sovereign, then the dynasty stuff seems like just another class of details for a conquest win, not the TW-trumping innovation I'd hoped for.