Orgasm Denial

I now think Mistress is getting in some practice ready for when the new Chastity cage arrives later next week. For 3 days now I have been denied an orgasm. Sex between us has been good, but as soon as I get to the point of ejaculating she has stopped me. Last night after serving Mistress and giving her complete satisfaction, I was denied an orgasm, she then waited a short while, made me kneel in front of her and masturbate, again only to be stopped right at the crucial point. An hour later she did the same again. She told me that there would be no more orgasms for me unless she thought I was worthy of having one, and that the only way I would now be able to ejaculate was through her milking me with a prostate massager that would empty me without having an orgasm.