Jo:
Since we are working mums, babies being close to maids is quite normal as they are the main caregiver all day. If your boy is not close to the maid, then I would worry more coz there muz be something that the maid is doing that causes the BB to dislike her. If BB like the maid, at least you know that your BB is well taken care off and can work in peace.
That said, you may want to tell your maid that you need her to not spoil your kid. If you boi is with you and he is crying, you will handle it. If she takes him away every time, he cannot learn whatever you are teaching him (such as that he has to accept you).
Also, maybe observe why your boi likes your maid to feed him. My gal likes my maid to feed her too coz she's more patient, will keep talking to her and playing with her. My maid also ensure got my gal's DVD on. For me, sometimes I never on the DVD and am too engrossed with getting the food in her mouth than talking to her.
Bottomline: Let your maid know that whilst you are happy that your boy likes her. She has to help you ensure that you are still the person your boy likes the most. It has to be part of her actions (e.g. my maid will always bring my gal to me, ask her kiss me, sayang me, "mummy here mummy there", ask for permission to go downstairs, etc.). Don't get too jealous of your maid coz if you send her back just for this, you will face the same problem with the next maid (if she is good) or face other troubles with the next maid (if she is bad). I rather not risk a bad maid.