Resting HR is 55-65, the kids come in our room, tv goes on,
dogs are bugging me to go outside to go potty -
in no time my HR is up to 90-100 and sometimes I feel a little jittery. By 8am I'm in my office doing some work and my HR drops back down to 65-80.
Sounds to me like you're getting accustomed to that rush of having to get everything ready and going for the kids and your mind and body are starting to prep for it a little early.