Rihanna and Chris Brown not done yet?

So are Rihanna and Chris Brown hinting they are not done yet?Just three days after posting on her Instagram page that she was single, Rihanna is singing a different tune. 
Two day ago Chris Brown Tweeted, then quickly deleted, a picture of himself and Rihanna (pictured above on the left) with the caption - Always started with Breezy like the Letter B and  Rihanna did the same thing, only she didn't delete her picture. She posted a photo of their hands entwined with the caption - throw back to last Thursday.