With my first I felt like she needed to be home for a nap, and that there were no ways around it. Now i have three and the hindsight of experience. If she's used to more then 40 minutes probably isn't enough, but think of all the stuff you'll miss out on if you don't relax for a couple of days here and there.
It's not like it's days and days in a row. I won't become a habit.
If you can't stand the feral-ness in the arvo, put her to bed earlier. I still do and my eldest is 8.5.