Oh HEEEYEEEELLL NOOO! That'll totally ruin it! Then it'll be like, "Honey, will you take out the trash? Honey, will you rub my feet? Honey, the garden needs tending. Honey, will you quit drinking that ale and feed and walk the dog? Honey, I think I want children." And then later, it'll be like, "Honey, go to the store and buy me some ice cream and pickles...NOW!!!! BEFOREICHOPYOURHEADOFFWITHYOURAXE!!!!!"
And you know it'd end in divorce pretty quickly because that's what most marriages do... But probably in Skyrim, you'd have to enforce the "until death do you part" clause.