My baby is 4 months old and cries when both grandmothers even so much as look at her. Is there anything I can do to help? I try to smile and make encouraging sounds so that she doesn't feel threatened by my mother and mother-in-law. The only person she doesn't act like this with is my sister, who obviously looks and sounds like me, and is always smiling and speaks in baby-speak to her. Could it be that the people she acts strange with are not smiling or acting confident enough with her, or is it a phase that she will simply grow out of?