2. Don’t get influenced by your client
You should always be in control of your patient and the situation, you are the professional and you must do what you have to do. Our clients want to see their eyebrows before finishing the procedure and when they see them, their comment is: Leave my eyebrows as is, I love them, do not do anything else.
But if you haven't finished, it is possible that the color wasn't properly implanted and that you will need to apply it again a month later. If you want to show your client the final result, you can give her the mirror after the first pass. That will be the color and effect closer to what it will be in a month.
You need to explain to her that at the end of the procedure the color will be 30% darker and that it is possible that the effect is more compact than it will be in a month. Thus, your client will be calm and you will be able to do your work as it should be.