> I wnted to know why she would unconfortable with having an orgasm

Is this a two-part question or a single issue?

> But when shes about to orgasm she feels like she needs o pee and is afraid of cumming. the thing is that sometmes she really did need to pee and sometimes it false alarm.

Achieving and enjoying orgasms can be problematical for some women. They are not as easy to come by as they are for the male of the species. Emotions, distractions, self image, confidence, and other mental clutter can sometimes get in the way. I suggest that the two of you talk about this. In addition there are some articles that will be helpful to her--and you. Here is the first one:

For Women Only- Help! Why Can't He Make Me Orgasm?

The urge to pee is discussed in it.

Question: Does she masturbate? If not then she absolutely must learn to do this regularly and consistently, first and foremost. Each person, male and female, is responsible for our own orgasms, we do not give them away. Here is some additional reading on the matter:

The Anatomy of the Female "O", Answered by Brandye & Dancingdoc2 & Inspired by Godiva

Female Sexual Response

How Do I Get Him/Her to Orgasm From a Hand/Blow Job?

The sensation of needing to pee generally happens with women new to the orgasmic experience, although, it can happen to anybody any time. It happens as a result of sympathetic stimulation of the urethra and/or from just reaching the trigger point of an orgasm. If she knows her bladder is empty, then she should just push right on through the urge and ignore it. In time and with more experience and successes the sensation will go away.

There are many, many threads of young men asking this identical question. Look around. Women need to learn how to reach orgasm; it uis not automatic for us as for most men.

If your finger is inside, you are probably rubbing the anterior wall of the vagina. The urethra is right behind that wall and this stimulation makes us feel like we have to pee.

There are those who do not believe in the G-Spot or in female ejaculation - both of which I experience and enjoy, however the urge to urinate is the signal that she will ejaculate and have an orgasm while she does it. All she has to do is to relax, breathe deeply and GO WITH IT!

Next time, please read the threads as this question has been answered MANY MANY times. Thank you.