Undervalued Nanny Seeks Guidance

   

  I work for a multimillionaire Hollywood VIP taking care of her 4.5 year old son and infant daughter. Most of the time the mom works at home with lots of sporadic travel. When I first started working for her almost three years ago I was hired as part time right out of college. I quit two years into the job because I just couldn't work under the table for someone who was controlling, stingy and unappreciative. She is nice but only just nice enough. She worked in the house all day but would avoid me while I was there and wouldn't say anything if we crossed paths in the house. Also when she would pay me she would have her toddler son hand me my check or cash. I felt like she was teaching him that I was paid to be there and therefor wasn't really important. Six months after I initially left the job, she offered me a pay raise and taxes paid to return, I hadn't yet found a profitable replacement position, so I came back.
   It's been three and half months since my return and although my employer isn't mean or rude or anything I still feel deeply undervalued. She pays me cash for hours over 40, but pays a lower rate than my actual pay. And still has her son hand it to me. Also there's still no petty cash available and I still often end up getting little things with my own money. The family has never done anything for my birthday which is okay I guess, and they only just found out when my birthday was because they ask me work on Saturday. She then awkwardly asked her son to tell me happy birthday, which he then said "whatever" and walked away. I feel deeply attached to these kids and I make a good wage with this family but I feel like like my self esteem takes a beating working for people who really don't appreciate me at all. And I feel trapped in the house because she also never lets me take the kids anywhere except the park. I don't know where to go from here, any suggestions?