Temis the Vorta wrote:
At some point after she "woke up," she spun the top and it didn't stop on its own, leading to only one sensible conclusion: jump off a ledge (and frame your stupid pigheaded husband for your murder so he'll kill himself or at the very least, be executed).
But Cobb stole the top and locked it away! That was the whole point. Subconsciously, her magic top would NEVER stop spinning, so she would always think that she was in a dream whether or not that was true.
I want to believe that it was real. Otherwise, the whole movie is just about a guy taking a nap, and none of it matters.