Hi, thank you for your question. Just a bit more information required to fully assist you:
-Are there any court orders in place, if so what?
-Is this a permanent move or a holiday?
Thank you for your question
My name is ***** ***** I have been a solicitor for more than 30 years
Your ex has Parental Responsibility for the children and the right to take them away (provided of course they are safe)
However it is reasonable for you to know the address where they will be staying (just as he should always know where they are staying with you) so that is there is an emergency you know if you should be worried.
However the sleeping arrangements are his business bearing in mind it is not a long term arrangement
Please ask if you need further details