Should I reschedule my wedding around my friends law finals ?

After planning what seems like 5 weddings that didn't fit my fiance's family's schedule, we finally picked a venue and put down a deposit on the only weekend date they had - May 5th. My bridesmaid and CLOSE friend is at Pen State Law School and broke down in tears because she said it falls during her finals and so she can't make it.

BUT my wedding is not actually on a day with a final ( see schedule here: http://law.psu.edu/current_students/registrar/registration/spring_2012_final_exam_schedule) My wedding is on a Saturday and the schedule says that there are no exams on Saturday or Sunday.

Here's the question: Is it unfair of me to ask that she study before hand and take 1 day to come? Or should I bite the bullet and start begging for different dates/looking at different venues? I know law school is really intense so I wanted to ask you guys since you understand her situation better than I.

Thank you in advance!

NOTE: I promise I am not trying to be selfish, I am trying to be the opposite. I am paying for her flight and hotel room as I know I would already be asking a lot of her.