Ever since the crossover with Amazing Spider-Man, Black Cat has been hanging around Matt Murdock AKA Daredevil. Last issue, it was suggested that the whole reason she slept with him was because she was hired by the Black Spectres to steal back the Omega Drive.
In Daredevil #10, we found out what Black Cat was really up to. She wanted to see if the Omega Drive really existed, and if Daredevil had hidden it some place secure. Since she was able to find it, she told DD that his security was lacking, and that she needed to hide for a while to get the heat off her for betraying the Black Spectres.
Tags: Daredevil, Mark Waid