Thanks Kitek, it is a dumb fight after all.
We've seen the scene, if Kamila said hello it was inaudible. So maybe it was unintentional but she was indeed a bit rude.
Was it money? it looked smaller than bills, like two tickets for something.
That was my guess about the airport too, that she went with him to bring the car back.
It was short but strong words were exchanged when Kristy went to the Kitchen. Noldus posted about it.
Even without knowing the language it's easy to see when people are arguing, Kristy even waved her off when she left the room. Kamila has been pissed ever since she woke up. Earlier when she went to pick up her laptop in the living room she didn't say a word or look at anybody.