This was something I wrote months ago (more than that, actually) and posted on livejournal. Inspired by New Moon, I found this, edited up a bit and voila!
The first time he saw her - the enigma known as Isabella Swan- he knew he would never be the same again. Her scent reached him before she entered the room. It was just as mouth watering as he imagined it to be. To smell it in the boy's thoughts was one thing, to experience it firsthand was truly remarkable. The venom pooled in his mouth as his cloudy eyes darkened. In over three thousand years, he had never smelt anything as exquisite, as delectable as this girl. He had to have her, and he would. Perhaps not then, but he wasn't impatient by any means. It was in his nature to be otherwise. He had all the time in the world.
"La tua cantante," he murmured, a wicked grin playing on his lips. He arched a dark brow at the scowl on Caius's face. "Such waste." His voice was soft and lilting.
Jane entered the room followed closely by Demetri, the others, and the girl – just a tiny little thing with dark hair and pale skin. She was frightened; her heart beating erratically, her eyes wide, tears running down her cheeks.
His hands clenched into fists at his side, his jaw clamped shut tightly. The bloodlust was so strong, so overwhelming, it took every ounce of his self control to not drain her right then, but control it he did. So quickly, in fact, that only the immortals noticed his reaction.
Aro closed his eyes for a moment and listened to the sound of her heart – so alluring, so hypnotic. A throat clearing brings him out of his trance, and he opened his eyes to discover his two prized guards waiting for him to respond as he should, but he was too enrapt to do anything but stare at girl in front of him.
For months afterward, he hunts only brunettes, a tedious line of barely palatable meals that no longer stave off his never ending thirst. In the madness that follows, it is only his fondness for Carlisle stays Aro's hand.
The second time he sees her is much like the first. There is no need for introductions, he knows she's there before she's even reached the castle door (truth is he's been waiting for her). Jane shows her to the throne room unceremoniously, the word human a curse on her lips. He purses his lips as he looks at the girl. Her scent swirls around him as she approaches his throne, more potent the he'd remembered.
"To what do I owe the pleasure of your unexpected visit, Isabella?" he asks, in his melodic voice, crimson eyes staring into brown. "And your husband? Should we expect him as well?" he raises an eyebrow, attempting to sound as indifferent as possible.
"He's not my husband," she says softly. "He believes I'm meant to have a normal human life. He left again." The sadness in her eyes is almost too much to bear.
"Such waste," he murmurs too low for the girl to hear. "So, what can I do for you then, Isabella?"
"Does your offer still stand?"