BB feeling is very straight, treat her good then she like you, if you treat her bad she will not like you or follow you. So if BBdon't like maid, you must supervise and communicate with your maid to see what's happan.
I agree that BB is very straight. My BB afraid of the maid (arrived for 5 months) at first, but then the maid is quite good to him and always play with him. Now he can accept her (but not stick to her).
If your BB afraid of her at the beginning is normol, but if this condition continue, you have to think about it, may be your maid is not good to your BB or ignore your BB when you are not around.