come on mamma, i don't think your baby is trying to push you to your limits deliberately. babies are not capable of thinking like this, and there are many reasons this could be happening.
the first thing that comes to my mind is that she may be shy or conscious in front of them and that is what stops her. it is possible that even if she knows who is who and how to address, she may not be able to express it.
the fact that she cries and shows her discomfort in some way is an indication that she wants to try but knows she is not able to do what you ask her to. i think you should give her some time. my elder one who is 9 now has suddenly become too shy and refuses to acknowledge family members and relatives. if you feel your baby is being stubborn, let her be herself for some time. stop asking her to address and do those things that you are asking her to do. i feel she will eventually start doing it herself once she is comfortable and feels it naturally.
Read more