Casey may have even been jealous because Caylee had gotten attention from her new boyfriend. imo she would not have been happy if eyes were not on her but on her little girl, after all we heard it from her own mouth how she thought people were only interested in Caylee and not her. Casey was living a hard life of clubbing, she is young but looks older than her years, someone my mother would call "hard boiled", in the clubs there would be younger prettier girls and Casey could have been resenting everything she felt Caylee had done to her. As Caylee grew older, with more of her own personality coming out, Casey could have been resenting her more and more every day. It's 1 thing to have a tiny baby who only coo's and gurgles, different from a little girl who now is defying you, telling you no and demanding responsibily and maturity from you.
VB