What do you think Kate wanted to say Sawyer before firing car got into the house?

It also seemed to me that she was going to say this, however, she really refused coming back to the island! So I'm confused. But seriously... what else could it be? I can't find any answers for this. Besides, we know that she had a reason to return! And that's for sure, cause she parted with Aaron in order to get to the island. I first supposed that she agreed to return because of Jack. But now I don't know. (I hope that the reason was Sawyer!!!)

probably

i believe that it has something to do with Claire but that's just my thought

Me too.I think that maybe Claire talked to Kate.
Also,the reason that Kate didn't bring Aaron to the island was Claire("Don't you dare bring him back!").Although,I can't be sure...Nobody can...

if you would have watched the new episode of lost it tells you that kate gave aaron back to clairs mom in order to go back to the island