"Unacceptable." She tilts her chin up, stubborn. "You can't just say no!" Her voice rises at the end of that sentence, a glimpse of temper flashing--not nearly as volatile as it will be, she hasn't faced her losses yet within the family, hasn't met the man who will send her spiraling toward a mental decline--but it's there. A promise of things to come very soon.

He is a frustrating arsehole. A potions professor, and he won't aid her! Bella spins away from him, storming off a few steps before she's surging back up to him, pressing close, in his face.

"You're no head of my house. You're a coward."

...If intimidation doesn't work, perhaps insults will.