Quoting nursemaya -mommy to 2:" sometimes you don't contract for 24 + hours. You should be seen ASAP. waiting would not be welcome to your doctor at all."
Not trying to be snotty but she has an appointment at 8am. And if her water only partially broke and she isnt having regular contractions or not even majorly intense ones she should be fine to wait till 8am. I went into labor with irregular contractions and my water broke at the Drs office. They also tell you you dont need to rush in if your water breaks just dont soak in a tub and monitor things. And since her appointment is at 8 she should be fine.