"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.
"We need to get him ready," Mother said, "I slide my finger into him and feel around. There it is."
Her finger found my prostrate and as she rubbed it, I moaned out loud and squirmed my ass back toward her.
"This is a man's spot, honey," Mother told Mary. "It drives them crazy and you can do anything you want with them when you find it. Here, you try it. Slide your finger into him and feel for the bump."
Mother pulled her finger out of me and Mary pushed hers in.
"Oh, yes," she said, "I feel it." I squealed as she rubbed her finger over my spot. She started sliding her finger in and out of me, finger fucking me.
Mother laughed and said, "That's it. You are a natural. Pull your finger out and add another. Finger him with two."
Mary did as Mother instructed, and was now finger fucking me with two fingers. My cock was rock hard and leaking as I moaned and pushed back to her fingers.
"Okay," Mother said, "Now for the real fun. You're going to love this." Mary pulled her fingers out of me and Mother lubed up my hole, then put the tip of her rubber cock against my hole.
"It's best to go slow at first since he is not that experienced," Mother told Mary. "But after he is really broken in, you can really pound him right from the start."
Mother pushed her rubber cock all the way into me in one slow thrust. Stopping and holding it there, she told Mary, "Let him get used to it, then we can go to town."
Shortly she pulled back and started fucking me with long strokes, driving me crazy as she kept pounding against my prostrate. I was panting and moaning.
