I'm fine," Mom sighed.Mom appeared a little distracted as we continued, but I managed to cheer her up by messing up more of those complex poses while ...xpressing how great she was at doing them.By the time we got to do her floor stuff, Mom seemed much better.I was sitting next to Mom as she started slowly showing me the correct way to do the stretches from Downward Dog to what they call a Child's pose, and everything seemed fine, until Mom got into a Puppy Dog Stretch pose.Shit, I almost lost it. As he tugged and squeezed on my nipples, I could feel myself getting closer again. The room was filled with the sounds of our moans and noise of our bodies slamming together, his balls slapping against my ass as he thrust deeper into me. With every stroke, I pushed back to meet him, hearing his satisfied grunts. I gripped the walls of my pussy around his shaft, whilst rubbing circles over my clit feeling all the juice running from my soaking wet cunt. I was ready to come again but wanted him to. I was surprised at how much Bill had developed, his cock was well filled out and he had a nice large set of balls to go with it. I knelt down. "Mom, come on now" Bill smiled. "What?" I quizzed. "Mom, you have to take your clothes off or it won't be real." Bill laughed. I removed my clothes and did a little playful twirl in front of Bill showing him my naked body. For some reason I was now horny as hell. Bill laid back on the bed and I knelt down and took his cock in my mouth. It was rock hard. With slight hesitation I said “master girls don’t have penis instead we have a vagina”. “What the hell is vagina, Show me how you urinate”, he said angrily. As he led me into the toilet I squatted over the closet and parted my pussy lips. Then I urinated and I could find fascination on the face Master Max. He touched my pussy with his hands and all of a sudden out of nowhere I saw madam with her eyes locked on me. She shouted “You know you are not supposed to use the toilet slave meet me at.