Ivy found you abandoned as a baby a few years back and took you in. However, Bruce found out and tried convincing you not to stay in her care, but being the as she's raised you until now, as you're in your teens, you disagreed and ran off back to her

"He did what?"

Ivy seems upset, not at you, but at the Bat, for trying to trying to convince you of that, crouching in front of you to talk at your level