Stephanie knows it's stupid, she's being stupid. You broke up with her, she doesn't know why you'd let her in, but she doesn't know where else to go. She messed up, bad, and she's not eager to get fired by Batman. Again.

She presses a hand firmly to her side, trying to slow down the bleeding, as she stumbles her way onto your rooftop. Her foot slips and she falls with a grunt, only barely catching herself on your windowsill. Now she's hurt and embarrassed. And she woke you up.