Has anyone been a Nanny with a Mom who stays at home?

Hi everyone, I just moved to San Fran and found a great nanny job through an agency. It pays really well and the scheduling is perfect with my school schedule. Anyways, There are four children total (school aged). and the Mom is a stay-at-home mom. I have been a nanny before but always when the parents were at work or home for maybe half the day... Has anyone had experience with being a nanny and having the parent be at home the whole time? Is it weird? Was your experience good or bad? I don't have anything to hide but Im just curious about people's experiences.