When I escaped my abusive ex and came back to the UK, I eventually agreed a proper contact/residence order with him as I had worries about sending her to stay with him abroad.
One of the arrangements is alternate Christmases spent with him in his country of origin. This was a different country to that in which he lived in at the time and dd always had to stay with him at his parents' place. This was not ideal - she hates staying there, as his parents shout and squawk, speak no discernable language (not that of his country they've been living in for the last 50 years nor of the one they come from, nor any English - only the dialect of the tiny mountain village they hail from), argue and the atmosphere there is just horrendous. His mother feeds her crap and she comes back several kilos overweight, pale and bloated too.
So, you can imagine how pleased I was that after a period of living and working in the UK (where he sofa surfed, so she was unable to stay with him here either), he returned to his home country and is now living with his sister, who at least is vaguely normal.
Dc will be staying with them, but despite repeated requests, he refuses to give me their address in case of emergency. This is especially important as he usually refuses to pick up his phone. He and his sister live in a town about 40 minutes away from his parents' town and, while I have their contact details, they would be absolutely useless in an emergency.
So am I being unreasonable in wishing to know where she will be?