» Mon Jun 04, 2012 6:04 am
Your spouse cannot be killed, excepting by your own hand. Follower spuses, though, can be glitch-killed by poisoned dart traps and lingering poisons used by enemies (the poisons seem to break the actor's protected flag).
The funeral meats cannot coldly furnish the wedding tables: there is no legitimate way to re-marry.
You can reset the marriage-related quests using the console, and then you can re-marry, but if you're not on PC, then you're out of luck. And I believe that this may prevent the Lover's Comfort bonus from working, though that could be another issue entirely.
Next time, please remember that marriage is not a decision to be taken lightly.