Sounds as if she had very little, if no exposure to actual health care before her clinicals. What is happening to her are things that will also happen to her weekly or so, as a nurse.
Have her think back to why she wanted to be a nurse, and see if it still rings true for her. Encourage her to use this website, and ALSO to use real live human beings- the advisors in her nursing program, and her fellow students.
I've had some students who expected that nursing was somehow going around in a nice clean white uniform, handing out tablets. It is always a shock when they realize that patients can be smelly, need assistance with bodily functions, are rude and nasty at times, and do unthinkable things at times. Now, most of these students got over the shock, and began to really enjoy the profession. Some did not. So, it's going to be up to her. She is still a student, and sounds as if she's young. If this continues to upset her, she may consider a different field- Social Work, Education, etc... But the best thing for her to do would be find an in structor she trusts and discuss it with her.
She is lucky to have you to support her!!! Give her lots of space. It may be that there is so much "new" and it is a bit of a reality jolt. Or it could be that she really doesn't want to do the clinical side of nursing. Either way, I hope she finds a solution that makes her happy.