My CAG likes my brother and boyfriend A LOT and wants their attention badly, flirts with them, offers her head for them, and swings upside-down from her cage when they come into my room. I try to limit their contact with her so that she knows I am her care taker and that I spend the most time with her so that she is my bird and not theirs. I made my brother be the one who got her in the pet carrier to go to the vets so I can be associated with only good things....hahaha.
I think it's just going to take more time and patience which is easier said than done. I figured I wasn't going to handle my CAG for several months and in just a few days of having her here I was daydreaming of taking her out and handling her, and then in 3 weeks she stepped up onto my boyfriends arm. I was SO jealous!
It might help too if you can wheel her cage into the room you are in the most if it's different than where she is right now too.
Best wishes!