(lack of) conservation of energy

The law of the (lack of) conservation of energy is as follows:

F+S+N+X =/<0, where:
F is the daytime fussiness quotient of the tiny human,
S is amount of sleep everyone is getting,
N is whether the small human is napping,
and X is anything else that can go wrong.

If S is positive, then (at least) one of the other values must be negative, since the total value must be equal or less than zero.

Example:
Baby starts sleeping? You will decide to major home renovations and/or your toddler will stop napping.

Toddler starts napping? Baby will start being inexplicably fussy all day, and/or you will get sick.

Getting better? It's tax time, and the older one catches your cold.

This explains why I keep expecting to catch up, and I never do.