Is 'My' cock aching to come yet?
Go on, ask out loud. No, beg me. 5 times out loud. "Please Mistress Kent, may this slave cum for you?"
Beg while you stroke yourself another 20 times. Think about my red fingernails slowly teasing up 'My' cock while you do it, imagine them slowly scratching around the tip and scraping all the way down 'My' cock...