I wouldn't do it FSD!! I totally understand that you said yes, I did too once. This DCP asked me during my summer holidays, if I would still take her boy because she didnt have any back up. I agreed (stupid me) Well the one day he didn't come until lunch time anyways (noon) so in the morning I took my kids to the pet store to get them some fish for their bedrooms. we got back home just before 11, and she was waiting in the driveway. I said "I don't remember you telling me you needed to bring him earlier?" and she said "Oh I didn't but I have a lunch date with a friend" which did not impress me, then she picked up about a half hour early and I comented that she got off early? (hubby usally picked up those days) and she said "Oh no, I didn't work today I went out for lunch with a girlfriend"....Nice! NOT! I will never do it again, and if someone wanted to try to feed me a said story, I will tell them that charge double rates if I work on my vacation days (and if you charge for your vacation days off, make it triple!) Honestly it is really disrepectful
that they would even ask!