Over the next six months Mistress, true to her word, made sure that I wore the CB-3000 from the moment the dice-determined 'stop' began. It was difficult at first, but eventually I got used to it. I was still let out sometimes, once I was even allowed to cum, but again I think this was just to keep me guessing all the other times. Rest assured I was still teased mercilessly, even when I wasn't allowed out. Mistress would lick my balls and the tip of my cock through the hole at the front of the CB-3000. Sometimes she even sucked my cock while it was inside the device, that was infuriating, to say the least.
Our sessions gradually became lengthier, as Mistress delighted in keeping me on the edge for longer and longer periods. One session lasted almost four hours, and when I finally came it felt like I had just spurted my own weight in spunk! Needless to say, once I recovered I swallowed it all, in fact I couldn't remember the last time I had cum and hadn't eaten it, even between sessions and stops. Mistress liked me to remember that my orgasms always had a price.
After one of these marathon sessions she asked me if I wanted to play another game with the dice. I hesitated for a moment and she raised her eyebrows. That was all it took and I instantly agreed. She smiled and told me that I'd be glad in the long run. She told me that the game would be difficult, but if I was successful I would find a very special reward waiting for me at the end. All I had to do was 'prove myself' and I would be rewarded. She gave me a dice and told me to throw it ten times. I did as instructed and Mistress noted the results down on a piece of paper. 6-4-4-6-2-1-3-1-5-4. As I threw the dice I wondered what they meant this time, I'd scored two sixes, was that good, or bad? I suspected bad...
"Good slave, that's a total of 36. The dice fell quite well for you, you could have scored 60."
My head was swimming, 60 what?
"Now, throw the dice again and hope for a six!"
I threw the dice, it was a four.
"Oh dear, poor slave...still, it could have been worse."
This was driving me nuts now, what the hell did these numbers mean? Mistress looked at me and smiled.
"Well slave, I suppose you are wondering what all these numbers mean..."
"Yes Mistress."
"Well, 36 determines how long the game lasts, or more specifically, how many times you have to make me cum before the game ends."
I nodded, that was not entirely unexpected.
"The other number is the number of times I will allow you the chance to cum during that period. Notice I said 'the chance' to cum, there are no guarantees for you slave."
I nodded again and then chanced a question.
"What will that depend on Mistress?"
She looked thoughtful for a moment and then said, "to tell you the truth slave, I haven't yet decided....nor have I decided how those chances will fall. If only you had scored five slave, then it would have been so much easier, so much neater, you would have got one chance after every six of my orgasms.... Ah well, I'm sure I'll find a way to decide, or maybe I'll just offer them at random."
"Thank you Mistress."
"Oh and one more thing slave, I know this is going to be extremely difficult for you, so I think it would be best if you were kept in your cage for the duration, don't you?"
"If it pleases you Mistress."
And so it began. The first six orgasms took nine days and the day after that Mistress came into the lounge where I was sitting on the sofa. She sat next to me, placed her hand on my groin and leaned close to my ear. Very softly she whispered "Are you ready for your first chance slave?"
"Oh yes please Mistress." I sighed desperately.
She peeled off her top (she wasn't wearing a bra) and straddled my legs, then pushed her gorgeous tits in to my mouth one after another. I sucked on her nipples and flicked my tongue over her soft breasts as my cock tried vainly to swell inside it's prison. She leant down and kissed me deeply, then told me to wait there.
She got off me and walked out of the room, leaving me aching for her to return. When she did I saw she was holding the red leather blindfold we used in our sessions. She straddled me again and as she slid it into place I enjoyed one last glimpse of her beautiful breasts before the light was removed completely. She undid my shirt and let it fall open, dragging her nipples down my body as she moved down onto her knees between my legs. She quickly removed my jeans and boxers, leaving me naked from the waist down, save of course for the CB-3000. She pushed my legs apart and snaked her tongue over my balls, before sucking one of them into her mouth. I groaned loudly and she sucked harder, her tongue flicking over it as it nestled between her soft lips.
Then she sat back on her heels and I felt her place the key in the lock of my chastity device. There was a feint click and then I felt the device being removed. My cock grew to it's full size in a matter of seconds, and Mistress curled her fingers around my swollen, aching meat.
"Mmm, that feels good doesn't it slave?"
I could hardly speak but I managed to croak my agreement. She licked the palm of her other hand and then rubbed it on the tip of my cock. She felt me tense and warned me that I was not to cum unless she gave me permission. Soon she was rhythmically pumping my cock and I was gritting my teeth to try to stay on the right side of the edge.
"Don't cum slave, if you cum now then you will have ruined all your other chances."
"Yes Mistress." I gasped.
"I want you to think slave, I want you to think back to a few minutes ago when I was on your lap and you were worshipping my gorgeous breasts, you love my breasts don't you slave."
"Yes Mistress, they are beautiful."
"Thank you slave, it's always nice to hear it, even though I know you worship every inch of my body."
"I do Mistress."
"Every inch slave?"
"Yes Mistress, every last wonderful inch."
She smiled and then continued "That's good slave, I never tire of hearing that."
"Thank you Mistress."
"So think slave, can you remember what necklace I am wearing?"
"I'm not sure Mistress."
"Oh dear slave..." I could hear her grinning as she spoke "...because all you have to do to be allowed to cum is to describe my necklace and then I'll let you cum. You want to cum don't you slave?"
"Yes Mistress."
"Are you sure slave, you wouldn't rather I just stopped now and let you wait a little longer?"
"No Mistress... please."
She curled the fingers of her other hand around my balls and slowly pulled them down towards the floor.
"So full of cum aren't they slave?"
"Yes Mistress." I moaned.
"Can you remember slave? Can you remember which necklace I'm wearing?"
"I think so Mistress."
"Have you got an answer for me slave?"
"Yes Mistress."
Mistress gripped my cock tighter and increased the pace of her movements.
