Rock-a-Bye Baby

Normally Dylan's bedtime routine goes something along the lines of bath-->jammies-->nursing-->bedtime story-->sleep. I take care of items 1-4. Aaron mans #5 in the event that Dylan is not putting herself to sleep, as has been the case lately. Aaron works his magic through the patented Awon's Bedtime Medley™, which consists of Baby Beluga-->Long Black Veil-->Rock-a-Bye Baby, and if you've ever been on the delightful end of the baby monitor for this little number, you know what a treat it is. Meanwhile, I get to go look at porn on the Internet.*

We have had a couple of indescribably unfortunate incidents in the past week wherein Dylan has worked herself into a hysterical frenzy while Aaron tried to get her to sleep, then calmed down instantly when I came and got her. Dylan is generally enchanted with Aaron and happy to spend endless amounts of time with him. There will be no selective pawning off of the heavy duty work of making the baby sleep. Is this some kind of conspiracy between the two of them? Haven't they heard the one about when Kate's happy everyone's happy? Would it work to attach a clapper to Dylan, then our bedtime routine would just be "Clap off"?

*Or whatever it is that I might someday want to do while not tending to the baby. I don't know, as this situation is purely hypothetical.