I have two DDs, one of whom is 12 and one who is 10. DD1 is probably old enough to stay in the house by herself while I work 9-5, but DD2 is a bit young. This holiday both have been going to a sporty holiday club. DD1 hates it as nobody there is her age, but DD2 doesn't mind it as much. I would like to leave DD1 at home to save her the bordom of the holiday club, but DD2 is adament she won't go to the club without her sister.What should I do?