just say no...or if you need the $$ say sure the kid can come but it will be $$ (specify the amount) for the the day. we can take her at 9 thru 5 only because that is what works for our hours. if you are offering eggs, waffles, cereal & the little princess wants pancakes say i'm sorry i can not offer them..you can have a, b or c. now which is it.

i have a dog that i watch whose owner is like this...(or was) until i adopted the ahrd line...& it is amaz9ing how quickly they change once you start charging them the current rate of sitting & treat their kid like a normal person would.

"oh stumpy, is it ok if i pick up my dog at midnight?" ah no.
"oh stumpy, i know it's christmas eve do you have room at your house for my little darling while i go away?" ah no.

yeah go the tough love route.