Collared!

The first hint was Matron demanding that we remove all our clothes. The second was the soft metallic click of the collar attaching around our necks. Third was making our bodies available for the pleasure of any male who happened to be on the premises. We had agreed to all of this ahead of time-agreed enthusiastically. Still, entering the Chateau, hearing the rules read outloud, was a little bit frightening too.
Thankfully, a squeeze from Vivian's hand had told me that everything would be alright. The next day Vivian and I were chained together, trying to calm each other with our eyes. Men in masks; men with whips, our bottoms bared. The whips whooshed through the air, one smacking against her buttocks at the same instant that the other bit into mine! Her eyes went wide and I felt mine go wider. The whips whooshed-