When the only personality ICA has/had was doing whatever took her to the next place (ie...keeping her from actually working, doing anything other than living off of someone else) then it makes sense. What guy of Tony's age wouldn't want someone to have the naked time with, clean house, make dinner? I think though that he was not that infatuated with her. Hence, why she kept so many other men in the backfield. We have since learned she wasn't exclusive with Tony...she was still playing the odds.
As sickening as it is to me, Caylee was just a poker chip. Where can I land next so I don't have to work? When you see Caylee through Casey's eyes, the true Casey, you can feel sick inside but still understand why Casey felt nothing after Caylee was gone. Because she was just a chip. A means to an end. Lament her for five seconds, in the mind of Casey, and then move on to another scam. Otherwise, why let JG believe falsely that he was the father? Just a means to an end. Her parents finally after years of her lies, called her bluff...and basically (imo) said that she would have to move out and they would take Caylee from her. Hence, no more free babysitters...no more partying on her parent's tab. No more places to go. I think that was why she invented the tale that she miscarried at the "no clothes party" trying yet again and unsuccessfully to indebt someone else. She thought that Tony might move back to NY...he had no loyalty to keep her up nor was he someone she could accuse of being Caylee's father...I don't blame Tony...I think he was just a typical guy that clearly fell under her spell. When you think about how long and hard Casey has been lying, since she was a child, she lied about being able to graduate, lied up until the moment of graduation when she and her parents had to get her grandparents out of the actual audience to tell them she wouldn't be crossing the stage...what I can't fathom is why we believe, or why anyone has a moment's thought about anything she has said or will say.
It is all to avoid fault and responsibilty. Something Cindy shielded her from up until those last three months before Caylee was killed. Finally, CA had had enough. And look at the end result. It makes sense. It makes me sick to my stomach and it is pure evil but Casey plays everyone to her own ends. And it is totally obvious to me. JMO.