Hate to say it mate but really the holiday split she is asking for is pretty standard and the argument that perhaps it would be good for you and your 5year old to spend some 1 on 1 time together is common - what dad wouldn't want jut to have that great bonding time? Don't worry so much about the other children, a sibling relationship will develop and evolve in so many different forms over time but you only get oe shot to be her dad. Fighting mum is hard, but whatever is going on at school is obviously being looked after by the school. wait to see what the principal says, I doubt there are huge concerns, but if there is understand the school would be watching the situation very closely!.