I'm confused. Did your MB think she had a part time job and later discover it was full time? I get it that it can be kind of difficult to hire a nanny to start at the same time you are starting your own mew job, but the first hours you quoted sound like great part time hours that you would have to negotiate for before starting an "office" job, and it would usually come with a decrease in pay. I really don't see how she thought she was working from 8-4 and half days on Fridays, and find out that she actually has full time hours, doesn't see her child much, etc. something is off here, op. Either she lied to you, or she is very ineffecient at her job, or she is depressed and avoiding her child. Whatever it is, I don't think it will change anytime soon.