Give them candy and teach them all the curse words you know.

Bring the permanent markers, glitter, and glue. They'll either invite you for a different reason next time or not at all, but you can have loads of fun with it.

I feel for you. It's good that they put so much trust in you. Use it as experience for next time so you will know what questions to ask. Some people are so selfish. Good luck (a remember to buy some ear plugs)

Tonight, about an hour before they plan on going out, disappear. The next day when they ask where you were tell them, "vacationing".

next time, dont let them take advantage dear

Ditch the kids they're party crashers

Sounds like something I would arrange

Dont go then that's unfair.

Confront them about it and either get a couple of days to do something fun or ask to be paid. Or both.

That happened to me once, it sucked.