She is in the monastery. If she is not there, check if you have completed the quest for the red-haired nun, where you need to pay the executioner for her ransom.
Viewing post in Knightly Passions [1.34 version] 18+ comments
I couldn't find her either. I payed the executioner, went to the monastery 4 times. The morning, she is occupies with her praying; during the aftertoon i can only see her sisters but she is nowhere to be seen. I can only "peep" at her during the evening at night, but then again i can't talk with her about the elf.
i already done that (i found her in a field.) Now, in my current quest, after speaking to the blacksmith (and advised me too seek medication for the elf from the red har-nun) i can't find her (nor in the monastery, nor the field.) I tried to explain that in my previous post, the only thing that i got from the sisters are just a dating trip (with the blue-hair sister) to the church bell.