You won't be allowed to wear panties around Master anyway so you might as well get used to it."Tawny just stared at me. I could tell she was having a ...ase of nerves and I'd have to do more than talk and demonstrate. She flinched when my hand dipped under her nightdress and gripped the waistband of her panties, but my sister didn't resist. I slipped off her panties and tossed them on the floor. I couldn't believe how submissive she was. I decided her training could be sped up if I just made. This went on for several minutes until I could not take any more. Oh god I have to fuck you, let me. She did not move but sucked harder and squeezed my balls and the base of my cock more. I was going crazy with desire and then I could not stop it. My hips bucked up and I shot a load of cum deep into her mouth. She gagged a little and then I could tell she was swallowing it all. There was not that much as I had pumped most into her pussy. Now I was totally exhausted and she seemed a little. My wife looked at Robert. Robert looked at my wife.Robert cleared a frog from his throat and said, "You don't think you could ... work up to it?"My wife took the plug from me. She hefted it and looked at Robert. She looked like she was thinking, deciding on what she was gonna say. She set the plug down on the table in front of her, picked up her coffee and leaned back in her chair. She took a long, slow, contemplative sip and after a moment said, "Given time, a lotta practice, some strong dope. "Don't you just love conversations that start that way?"What kind of problem, Shelly?" I asked warily."The-us-not-having-sex-for-three-days-and-I'm-climbing-the-walls- kind," she replied."Oh," I said brightly."Yeah, oh, you got me addicted to the Kong and it's your responsibility to see that I get a fix any time I need one. Got it?"I got it. I teased her all the way to school and any time we were together for the rest of the day. On the way home I played with her through her cute little Super.