Mistress would start off by restraining me face down so she could pull my thong to the side & start teasing my pussy hole first with her fingers to lo...osen me up a bit before she would start insert an inflatable vibrating butt plug which the more I pleased her the more she would inflate it & turn up the vibration, this would go on for a while making sure I was losing control with pleasure slapping my arse with a riding crop and calling me the slut that I am then she would untie me then commanded. "Andrea seemed unconvinced but not against the idea."I know it's weird but maybe it'll get you off even better. Come on," I begged and she relented and was soon letting herself in our front door."We're up here in my room," I called out.When she came in and saw my sister, she asked again, "You sure you want to do this?" Yeah, it kind of turns me on, actually. Doesn't it you?" Well, yeah, maybe," as she starts kissing me, pushing me toward my bed.We were already at each other's clothes and I soon. Then she mentally chastised herself. How could she possibly be so critical of Barbara after what had happened last night?Barbara stayed only long enough to drink a cup of coffee and invite Arlene over to a party that evening. The last thing in the world Arlene felt like was attending a party - especially one of the typically raucous kind the Carters gave - but she politely accepted, figuring that she could put in a quick appearance and slip quietly home.She arrived at the party a little before. . Jan was sitting in the family room watching TV when Peter walked in."Hi Jan, what 'cha watchin'?" Just some dumb old movie. Nothing else to do." Where is everybody?" asked Peter.Marcia and Greg, I don't know, they left a few hours ago. Bobby and Cindy went with Mom, Dad and Alice to the shopping center, they just left." Sooo," grinned Peter, "that means its just you and me, with the whole house to ourselves." Yeah," said Jan, catching on and grinning herself, "the whole house, every room in.