Would Kristen Stewart actually hang out with Rupert Sanders again? Would she possibly go back to the relationship that temporarily separated her from Robert Pattinson and broke up Sanders' marriage?

We snapped these exclusive shots of Kristen Sunday night at Malo Cantina in Silverlake -- the same place Rob took her last week to celebrate her 23rd birthday and the guy driving the car that took KStew and her pals home looks suspiciously like Rupert and the car looks like his black Acura!

After RPatz left town on Saturday, was Kristen getting lonely?