You can get virgin pee from Freya outside the Watermill on some afternoons she's sitting on a tree trunk and fiddling with herself.Do not use the walkthrough. I went through the "Sly Fox" guide, which is listed as 3 in the guide. As a result, sister Susan is no longer a virgin and now the quest with the missing child cannot be completed because you need virgin urine, which can only be obtained from her.