What does Ivy do?

Batman was searching for Robin in an Alley. Luckily, every member of the Batfamily had a tracking signal. Harley disable his Robin's but luckly Batman didn't cut off his.

Robin/Jester gave her the frequecy. If Harley was going to have a boy toy, so was Ivy. Ivy watch Batman go down the Alley, searching for clue.

She smiled, knowing it was Bruce Wayne under there. She had a perfect plan to get him.