There is no way to tell for sure if this will improve, because a certain small percentage of boys and girls remain enuretic at night through their childhood years. However, it is very probable, particularly in light of the young age she achieved dryness during the day, that this will be fine as time goes on. There really is no other route to go except to tell her, in a supportive way, that you have the same goal she does, and that when she's persistently dry in the morning she can dispense with the diapers.