It'd just end in disaster. As good as Hadvar is, I think he's depressed and a little resentful.
"Prefect."
*awkward silence*
"Dragonborn, eh? I'm not even sure Rikke knows my name."
We all know how marriages like this end up.
Well, maybe the femDragonborn/MaleDragonborn will be able to help him out of the angst?
Still, it's interesting to imagine him cooking meals for you. xD