That's such a brilliant idea: putting someone's heart up for adoption becasue they haven't take care of it. It's kind of quirky and funny, but sad as well. Espeacially the end when she realises that she can't feel with out it.
I really liked the style as well, it was short and to the point, but it felt like there was a lot of emotion in there as well.
For as short a story it is, it's charming and very well written. I liked the fact that you were able to delve into your character while maintaining the fact that it is indeed a short story. Once again, very well done, and I look forward to more of your work.