A Work in Progress

It's been a little while since i've written, mostly because life had interrupted, but also, because there hasn't been much to talk about really.
A few days ago, Master told me that i could expect to be cumming a lot more often than i had be and to be prepared for it, and i thought i was... but i was wrong. i have said before how it's frustrating to me because i feel like i can't serve my Master the way i should be and have talked about all the silly things that go through my mind because of this. Master has been very patient with me in that he has not punished me for those thoughts or feelings, at least not yet... smiles. But the last few days, Master has been showing me how i do serve and please him in many ways that i never really thought before. One thing my Master loves to do is watch me cumming and this is the primary reason i am spoiled the way i am when it comes to orgasms. Another of my Master's favourite pass times, is to just have me "pose" as he wishes and just look at me while i hold that position for as long as he wishes. 
Last night, Master put a twist on both those things. i have been back to my exercises and also did a lot of heavy lifting yesterday, and my body was feeling it already. Master had me stand, get my little bullet and position it inside my pants so that i could stand with my legs closed and my hands behind my head, elbows back. With the bullet buzzing away merrily on my clit, my Master had me stand in that position while he spoke to me. Now at first thought, it didn't seem it would be that hard, but as the minutes passed, the pleasure radiating from my clit was slowly being drowned by the muscles in my arms and legs aching and beginning to knot. Master had me hold that position for quite a while, correcting me if i began to slouch or my elbows came forwards. Finally he allowed me to cum, and i came very very hard, and the double edged sword reared its ugly head.
As the orgasm hit, my muscles were screaming for release and then the orgasm just continued to go on and on and i realized there was no end in sight. Even while cumming i had to maintain the position fighting the need to move my limbs. Master then allowed me to put my arms down and put them behind my back, at first i thought, thank god, they were about to fall off, then as i positioned them behind my back, crossing my wrists over, i felt a new pain in my muscles. The pain, like the orgasm, was just not letting up. Master had me cum again and again, my arms moved from behind me to being out from my sides, shoulder height, they felt like lead and i had to concentrate on keeping them up. The sweat was forming and i could feel my body shaking both from the pleasure of the orgasms sweeping over me and the pain that was filling me. Master ordered me to gush, i gush very hard, my body trembling even more, i could feel charlie horses start in my thighs and i was close to tears.
Finally, Master allowed me to put my hands on my hips, a very welcome relief, the pain beginning to subside as the last waves of orgasm ran through my body. i was quivering and trying to catch my breath when he allowed me to sit and relax. Master just smiled at me and said, i told you this would happen, and you can expect much more of it.
This morning doing my exercises was quite painful and i am still very sore, i know it is good for me, as it shows me i am working, but still and all, it hurts, but worth every ounce of pain!