Besides the fact it appears George and Cindy reached out to provide extra information during the Greta interview, (which is a great point) the day in question, Father's Day, should be examined.
What was the atmosphere in the home that day? Cindy takes Caylee to see her great grandfather in his nursing or care home.(We've all seen the video) If I'm correct, that is also the day Cindy learns from her mother that Casey had her hands in the grandfather's account and removed money. This act alone would anger not just Cindy's mom, but Cindy herself.
So, did Cindy confront Casey with this information when she returned home with Caylee?
Certainly this would have set the stage for an argument between Cindy and Casey. Would Casey taking money from his account have been so embarassing for Cindy and maybe be the last straw she could take from her daughter's behavior of ripping off other family members? She was furious with Casey?
I believe there was confrontation between Cindy and Casey about this matter. So, yes it is very possible the fight became physical.
In fact when telling the authorities about the case of a missing Caylee the originial date given is June 9th a full week before Father's Day. Is there a reason everyone was avoiding the Father's Day Sunday. Was the day that unpleasant. Had it been a day no one wanted to talk about?
I'm not saying this is proof that there was a physical fight between the two, but certain we should take into consideration there was good reason mother and daughter would have had a blow up that day in particular.
JMO
Cindy also covers this base in an interview stating "the money stolen from her mother is none of her business." It is between Shirley and Casey.
Another lie imo. Everything is CA's business. She's a control freak.