We have had similar issues in the past. When this starts to become a problem, I preface any session to help her with, "I will look at this and try to help you IF you promise to be attentive and respectful while we work through it. If you aren't, I won't be able to help.". And... if she behaves badly, then I just leave with the comment, "Please let me know when you are ready to try this again with a better attitude." Usually it works...