My 6 yr old DD has been invited to go to a theme park by a schoolfriend for her Birthday. The thing is I don't really know the family all that well apart from a few school parties and the odd occasion my daughter has played at their house. I have since found out that it is only the Dad who is taking my DD and her firend to the theme park. Am I right to be concerned and what the hell do I say to get out of it?