Hmmm...Lets see.
I am a SAHM. My DH lets me sleep in and he handles the morning breakfast, packing lunch and taking kids to school.
They are very quite in the morning as not to disturb me, so I am quite surprised that you did not show the same courtesy to her. I think you are being passive-aggressive because you actually don't want her to sleep in and you resent that she is at home.
I have only one thing to ask you - is she a part time speech therapist who only made $18K last year?