Peace and happiness have been restored.
After the disastrous morning on Friday I pulled each of my boys aside, one by one, and told them how sorry I was for my behavior. I told them that mommy was just being a mean grouch and that they did nothing wrong. I told them what wonderful boys they are and how sorry I was if I hurt their feelings. I asked them for forgiveness, and they gave it to me without hesitation.
When the boys woke up from their naps that afternoon it was a big love fest. Lots of hugs, and snuggles, and kisses, and "I love you"s. I think they appreciated my apology almost as much as I appreciated their forgiveness. And we were all happy to start our weekend with a clean slate.