The context of the following conversation is Casey cared for Kai's children. Casey didn't mind doing so for Kai since she was a friend.:
Casey says I love babysitting for Kai when she's away on business.  She's such a great mum ..
The friend responds I know!  And her kids are just such a joy.  They are the most well-behaved kids I've ever met..
Casey responds And Kai pays me really well, too.  When I keep her kids for three days she pays me five hundred dollars, and twelve hundred when I keep them for a week..
The friend responds Does Kai provide stuff like the kids favorite foods, and gas for the car, and things like that?.
Casey responds Yeah, she provides everything.  But honestly I would do it for free because Kai has been my best friend since we were in high school..
The friend responds My mom always told me, If you're good at something, never do it for free.  So don't feel bad about taking what Kai pays you!.