With DS my waters didnt break. They were broken by the midwife when i started to get the urges to push.
With DD they broke in the middle of the night at home.. about 2.30am or something. I woke and felt a small trickle.. didnt know if it was just CM or what.. thought i better go to the toilet just incase.. as i stood up out it came, luckily we have an ensuit right next to my side of the bed.