teased and denied

My Mistress stands before,
my cock caged in cold hard steel.
She runs her whip along the cage brushing against my skin.
I shiver and shake ,
my penis throbbing as it tries to grow harder in the confounds of its prison,
My Mistress laughs , she slides her gloved hand down around my balls squeezing them tightly in her hands.
she tells me not to move as i shake with the pain, she squeezes me harder, my balls aching and turning blue,.
My mistress kneels before me taking my balls in her warm mouth , she bites hard down causing my to jump with the pain she bites even harder telling me that if i don't obey her she will bite them off.
My cock is straining to be released but she just stands up and walks away, telling me not to touch myself or she will never let me be relieved