Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
How often do the children spend the night with their father?
Why do you not wish her to know where they are staying?
Just for clarity - as far as she knows you do not know where the children live?
It is not unreasonable for her to wish to know where the chidlren are staying.
After all when you hear about a disaster it is nice to know that you do not need to panic.
Indeed usually the court would expect a contact parent to confirm where the children will usually stay - and would be lenient when t comes to a breach of the order while matters are being resolved.
However in your case it is unlikely that the court would be sympathetic to her - after all she has not told you so that you have that reassurance.
On that basis I woudl suggest that you email her and confirm that you will indeed give the address - when she tells you where the chidlren are living.
I hope that this is of assistance - please ask if you need further details