Mommy Dearest: Footing the Bill For Friends? Our six-year-old son loves to play with a little girl his age in our neighborhood. Since both of her parents work, the children usually hang out at our house and she regularly goes on outings with us. But as time passes, we realize it's an additional expense to keep paying her way. Her parents always thank us, but never send her with any money. Is there an appropriate way to ask?