The Warden has to actually choose the option to deliver the letters as opposed to just telling them their husbands are dead, otherwise the quest may not mark itself as complete. If you have any companions with you and you say: " Would someone like to handle this for me?" They will deliver amusing one-liners.
There are four wives in total, the locations of which are as follows:Denerim Market District - Sara, located straight ahead from where you enter from the World Map (by Marjolaine's house). Dirty Back Alley - Tania, located in Denerim beside the cargo (across and to the left of Quaint Hovel). Lake Calenhad Docks - Larana, located inside the The Spoiled Princess. Redcliffe chantry - Irenia, she is located in the chantry in Redcliffe, it should also be noted you can still give her the notice if you do not save Redcliffe from the night attack. You just have to come back at a later time and she will be in the chantry
- 175 XP
A list of unfortunately humourous responses from Companions can be found here: https://www.youtube.com/watch?v=a9WL4hl-4X8