My Heart Is Spoken For (ON HOLD)

Kara(16), after losing her family, finds herself homeless. But the Clarkes', a rich family, adopts her. Though the reason isn't love, but for her to care for their sick child, Bell. She has Congenital heart defects. Her condition is severe, and Bell is waiting for a heart. Despite her better judgement, Kara loves Bell like a little sister. And she promised herself that she will, if Bell can't get a heart in time, donate her own. To Bells parents' delight. They consented to her donor card, as Kara is nothing to them.

But when a HOT guy falls in love with her, and see's her for more than Bells' heart. Kara begins to love this guy back, and as Bells' condition worsens, the date of her death creeps closer. How can Kara return his heart with her own, when it's been promised to someone else? ON HOLD, but just for a bit! Sorry...