If I were you I would advertise in the mean time and if you get a fulltime opportunity with another family? take it! i have experienced holding spots for mothers on mat leave that intended to bring both kids back to me and they either made other arrangements to save money or tried to drop their hours back to save them money and I ended up losing them as clients or losing money due to my kindness. IF you find tqo families to fill the spots you will be better off anyway. Like so many of thes women have told me in the past....having a family of two children is a liability anyway, if they leave..you loose two spots.