@InternetH0F Charging just to have them over; NEVER! If they have a snack so what. Use the bathroom! Hope her boss charges her to use the bathroom. Sit on the couch? Better stop using inflatable furniture.
@InternetH0F I could understand asking for money if you were making arrangements to actually take the children out somewhere like a movie, boardwalk, amusement park, fair, etc. Then it would be so they could have a little spending money of their own for games, rides, something extra.