Is it absolutely impossible to divorce Aela, without killing her?

I'd like to remarry Ysolda. Plus I've helped more people so my wedding will be better. Last time it was some guy from the East Empire Company.

I am on Xbox 360, fully updated, all DLC.

You cannot Remarry or divorce at all, it is impossible without mods or console commands.

Assuming I killed Aela, could I remarry?

I won't kill her, cause that detracts from the game.