She used to move around in the house in t-shirt and pajama and she never used to wear anything under her t-shirt. I could clearly see the nipples tryi...g to tear through them. On one pretext or the other I used to touch her and try to move close with her but initially she was very non-supportive on this but lately she was freer in her approach towards me.One day my aunt and uncle went out for a wedding and said that they will be back only the next day. I was alone at home when the door bell rang. "Oh, I'm sorry to hear that slut," Vicki replied mockingly. "But today, rather than me putting it in, I think we'll have you put it in yourself." Leaning forward, Vicki handed the plug to Kathy who was still on her hands and knees at Vicki's feet. "Now turn around so I can see that fat ass of yours."Once Kathy was facing away from Vicki, she ordered, "Head down. Knees spread wide." When Kathy was suitably arranged for Vicki, she then indicated, "You may lubricate that plug with your mouth or. "Take off your blouse, your bra, and your skirt, then kneel on the floor", I commanded.She quickly removed the clothing that I had directed her to do then knelt down on the floor, her hands resting on her thighs. She watched as I pulled a pair of wrist cuffs from my bag and set them on the bed in front of her. Her eyes followed again as I pulled out a slave collar and held it up in front of her face."This is your last chance to back out of this", I told her. "You can get up, get dressed, and. ..it turns out, they did because I told them, "do whatever you want, just fuck me, please just fuck me.." though my words were muffled by the big, soft balls in my mouth.The guy laid back on the couch, never letting go of my hair, so his cock was at mouth level and I opened wide to receive it. My knees were on the floor and my ass was in the air in total abandon as I gagged on the huge slab of man meat in front of my, letting him use my head and my mouth like it was a pussy and face fuck me. I.