I was in between heaven and hell... Kneeling naked in front of my new mistress, I didn't know how all this would end. Being aroused as I had never been in my whole life, on the one hand, and my adorable but bitchy sister-in-law as my new mistress, on the other hand. "I want to know what you feel like right now, slave," she briskly asked me. I was torn from lethargy by this question and had to think for a moment. What did...