1. Try to complete the remaining quests.
2. Talk during the day in church with everyone you can.
3. If no one tells you where the nun is in the church, she is probably on the field during the day.
Viewing post in Knightly Passions [1.81 version] 18+ comments
Ive done everything you suggested. The only quests i have active is the main one and quest 14. During the day none is in the church except in the morning but I cant enter cuz of the ceremony. In the afternoon it says I cant acces the nun cells and should come back in the evening. In the evening I can only peek at the nuns but one of them is missing. In the night I can only acces the sneaking into brunnette cell scene. One nun is constantly missing except in the morning ceremony (redhead nun that ofdered to be a slave for 1k to excecutioned). Ive tried visiting the field in all times of day but none is there.