Hum j'ai jamais fait de commande concernant une quete.
http://elderscrolls.wikia.com/wiki/Marriage
Ici ils disent de procéder comme ceci :
DivorceEdit
Since divorce is not actually an option in Skyrim, you can do the following if you are not happy with your choice of marriage. (PC)
You DON'T need to abandon or sell your Amulet of Mara. After following these steps you can look for a new partner, just remember to wear the Amulet of Mara.
(Since console players do not have the ability to use console commands, the only way to truly be rid of your spouse would be by murdering them, but the are set as essential (Tried to kill, didn't work))
Kill your spouse
Enter console command Setstage RelationshipMarriage 10
Use console commands resurrect on your ex-spouse (and eventually setrelationshiprank player 4 to keep the relationship status obtained with the npc related quests)
En gros :
1- tu tue ta femme
2- Tu ouvre la console tu tapes : Setstage RelationshipMarriage 10
3-tu resurect ta femme avec la commande resurect ( en la ciblant dans la console cette fois)
4-(optionnel) tu fais la commande setrelationshiprank player 4 (en ciblant aussi) pour rétablir ton niveau de relation que t'avais avec le pnj
voila j'espere ca vas t'aider