"Did you take your vitamin today," Mother asked me, watching the video and continuing to fondle my hard cock.
"Yes, Mistress Mother," I answered, trying hard not to squirm under her touch.
Years ago, when I first started puberty, my Mother took me to a special doctor. After a naked exam in front of the doctor, her nurse, and Mother, she gave Mother a prescription for a special vitamin produced by Athena Company. I didn't realize what this so-called vitamin did, but the effects on me were pronounced. It caused my growth to stop short of what I would normally do, ending me at five feet seven inches. It also arrested hair growth on my body so the only hair I had was on top of my head and my eyes, otherwise my entire body was smooth and hairless. Muscle mass did not develop as it normally would, but my ass grew wide and round. It also made me a very docile person, very shy, and gave me a large threshold for pain. I have been taking this special vitamin daily under my Mother's direction.
Mother and Mary were watching the video Mary created that afternoon, of her and Irma using me for their fun. Mother kept remarking how well the two girls were developing into first-rate domms and how much I seemed to enjoy their control over me. Mary, constantly squirming on the sofa, told Mother how much she really enjoyed having me as her submissive toy.
When the video was finally over, me standing naked between the two of them the entire time, Mother looked at Mary and raised her eyebrows.
"It excites you to use and whip your slave, doesn't it?", she asked Mary.
Blushing, Mary said to her, "Yes, Mother. It does. I do get excited and actually get wet down there."
Finishing her wine and giving Mary a big smile, she said, "Well, you are old enough now and I think it is time you learned how to use your slave for your real enjoyment."
Mary's eyes got big and she said, very excited, "Really? That would be fantastic. Please show me, Mother."
Mother stood and took Mary's hand. "Let's get a few things from my closet." And looking at me, she said, "Upstairs, slave. I want you on your bed when we get up there."
I hurried up the stairs to my room, nervous but excited at what they might be planning for the evening. I lay down on my bed waiting and soon the two of them walked in. My eyes got really big when I saw them and what they had.
Both had changed into baby doll nightgowns and sticking out in front of each was a large, silicone dildo. My mouth fell open in disbelief looking at them. Mary was also carrying her belt and Mother had a tawes in her hand along with some lengths of rope.
Mother and Mary tied my hands and ankles to the bedposts, the same as Irma and Mary had done earlier. I started moaning and mewling, knowing what was coming.
Mother picked up her phone, and after taking a few photos, made a call. I could only hear her say, "Sure. Just open your window."
Mother walked over to my window, pulled up the shade, and opened the window wide. She smiled and waved, probably to Mrs. Jacobs next door.
Then she walked back over to the bed, Mary standing there with her belt and squirming. Mother smiled and said to her, "Ready to have some fun?". And Mother slammed her tawes onto my ass, causing me to scream.
Not missing a beat, Mary immediately slapped my ass hard with her belt. I was squirming around on the bed the best I could with my restraints and screaming out with each hit.
They took turns, sometimes giving me two quick ones in succession. Their strikes went from just below my shoulder blades down to my knees. After five or six each -- I lost count -- I was sobbing uncontrollably. Finally, after a few more each, Mother said to Mary, "That's enough for now, baby. Let's get him ready for the real fun."
Each one untied my ankles but left my wrists tied to the bed. Running her hand over my now very sore ass, Mother said, "On your knees, slave. Get that ass in the air."
I did as she ordered, my ass now sticking up while my face was still down on the pillow, tears running down my cheeks. I whimpered as I felt her hand run over my ass cheeks.
"Excited now, honey," Mother asked Mary.
"Oh, yes," Mary replied, "Excited and ready for the next step."
Mother reached over to the nightstand and took a tube of lube and squirted some on her finger, then rubbed some down my ass crack.
