I am in the process of agreeing a contract with a parent. There is a time in the day when I have to drop a child at school and her children attend a club. The only way round this that we can see (apart from them stopping the club, which she doesnt want) is for me to drop the children at her friends house, and meet them at the venue 45 mins later. Is this ok to do? And do I charge while they are with the friend? I'm worried I still have responsibility for them but wont actually be there.