Stepdaughter Graduation Tickets

Oh, this should be interesting.  We contacted the high school to see how tickets are handled for my stepdaughter's graduation ceremony.  For an arena that seats 4,500 people, they are only giving eight tickets per graduating student.  The ex and stepson, stepdaughter's boyfriend, maternal grandparents, paternal grandparents, ex's sister and brother-in-law = nine people.  I'm curious to see how they handle these tickets and if they go directly to the ex, how she will divide them up.  Wondering if hubby will get his share of the tickets.