donīt worry she will not get bumped ... thai often shows even in f0 when there is noone booked .. i had problems to book online and a tg office told me they did not understand as there have been no bookings in the class i needed so far .. some days later things cleared ... if your wife is early at the airport and they have the stretcher seats they might give them to her if they are not overbooked and if they are i am sure they will give here a seat in c ... status or not.. good luck