I run a photography business from home also. I often have Emma at home when customers come to pick up orders/view albums etc, but never during an actual shoot. but that is because I know it would be impossible. Emma is too young to understand that she can't be 'involved'. I think if you are still able to work with your child there, then by all means go for it. And by letting them know they have the option of choosing a day when she isn't there, it's totally up to them.