I work 9 hoours and that is it! I know many many providers who only work 9 hours...so depending on where you live, I don't see any problem with that. I personally would wait until the mom asks as she hasn't and you may be making assumptions for nothing. If she starts at 8 then she will most likely finish at 4 as most people work 8 hour days (well I am in Ottawa where we have many govt workers...so that is how it works for them).