I know everyone is saying no. But before I would tell you no, I would ask you if you have access to more information. I am not sure how splitting a donor works so I am not sure if this could be applicable advice. So with that, I would see if she has siblings and what their situation is. I would also ask to find out about her parents/grandparents/aunts and uncles. Yes, sometimes obesity is genetic. However, on the flip side she could just be an anomaly in her family and let herself go. Not everyone who is obese is it genetic. It could simply be she is lazy, doesn't have good eating habits and chooses not to take care of herself.