Yes, you can sniff insincerity from a mile away. So can your child. You’re careful when someone pries too much into your life without first really getting to know you - and that includes relatives. However, this aunt is different. She asks questions without that interrogative edge, and she honestly listens to your family’s struggles while reserving judgement. Your child’s well being, in essence, is her priority. Not whether you look good enough for her own "family portfolio" or polished enough for her tastes. She understands it’s not about her, it’s about your child and she shows it.
This leads us to the next quality of an awesome aunt.