You will become even more premature for me. I'm going to work you hard. You're only allowed to use one finger this time. You will have to get off just using that. And it will increase your sensitivity for the next time! If you can orgasm with just one finger, your nerves will become accustomed to this stimulation level. Once you add more stimulation (such as a full hand), your nerves will become overwhelmed and you will cum incredibly quickly. Of course, I'm also going to use my psychological powers to make you cum quicker. I'm going to get more dominant in this one, and you are going to get more submissive.