How to "tap out" of childcare without traumatizing the kid?

I'm the primary caretaker of our two-year-old. There are times when I'm just so exhausted I just Can't. Keep. Going. My spouse is wonderful and willing to take over in those times. However, I always feel bad when I just say "I can't do bedtime today, could you do it?" - I mean, I wouldn't want to hear that as the kid. How do you all do that? Is there a non-hurtful way of "passing the torch" that doesn't make the child feel like a burden? via /r/Parenting https://ift.tt/2uUVzgj