Parent requesting extended hours

[kindertime]

I would personally never take a child who would arrive at the beginning or middle of nap time.

For 6 or 7 hours, charge your full day rate. If you use a contract, (IMO you should) then specify the exact drop-off and pick-up times. If you leave it vague then you may have problems with late pick-up or early drop-off. So, for example, Mondays 1pm to 6pm, Tuesdays 1pm to 7pm, etc. Or... every 1pm to 7pm. That way, if they pick-up at 6pm, well, bonus.