Ex dh is taking dd's away to his gf's sisters for the weekend and I am slightly anxious as they have not been there before. She lives quite far away, ie a couple of hours drive. I completely trust their dad, but I feel I should be able to contact them at any time. They are 7 and 10. I have asked for gf's mobile number, her sister's number and the address they will be staying at - ex dh thinks I'm being unreasonable. Am I?