Hi, There are many reasons why she behaves like this. It is sad that she has you both with opened arms and is not taking advantage of the relationship in good way. There could be many reasons why she behaves like this from the fact she was adopted to the way we she raised as well as her own personality and etc. I think the fact that you both were there for her before and shows that you both are doing your parts and there is not much more than you both can do. She is an adult now. You can guide her in the right direction and even suggest counseling for her. She needs guidance since she does not seem capable of making right decisions nor appreciate what she has in the both of you. Please let me know if I can be of further help.
Do you think she is looking for a hand out or just lacks pride in personal issues
To me it seems like she does lack pride in personal issues and may not even realize what he has in the two of you nor what she is doing.
She may enjoy hand outs as well, but I do not think that is her main issue. Based on all her actions there is more to it than that.