Oh I am so sorry.... what a shame - but yes you cannot be there all the time. Mine are really good at showing no progress for hours, and the minute I disappear things move on... I also had to pull one kid which came with one leg back, and by the time I came down (having seen her on the camera to start to push) and dashed down, the head was out, so all I could do was pull... but he came out ok.
Hope your girl come round ok.