Monoxide,
Thanks for bringing that up. Amy mentioned that Casey brought Caylee to adult parties. Caylee woke up once or twice and Amy said she looked like she was going to cry, but didn't and fell back to sleep.
Nate said that Casey and Caylee were there full time. We do not know exactly what that means, but both of them spent a lot of time there.
When Casey spent the night at Ricardo's place, there was a time or two that Caylee slept in the same bed, according to Ricardo's interview.
Anyways, to get back to the subject, the guys thought it would not be a good idea for Caylee to be there full time. I think this was the motive for Casey. Since the guys (including AL) did not want Caylee there full time, and Casey wanted to be there full time, she had to make a decision. Go back home to Mom or get rid of Caylee, and stay with AL and the guys. Seems like she chose the guys. Susan Smith all over again.
I agree obviously she was killing two birds with one stone. Kill Caylee get to be Tony's girlfriend 24/7 and kill Caylee and get back at Cindy