I wouldn't waste too much time feeling badly unless she has some disease that brought this on. If that is the case then obviously it's pretty sad. But otherwise it's her own fault that she has become so enormous. She is more than likely far too greedy and lazy and likely has too little self-control. I wouldn't feel badly at all. You didn't make her so obese, she did that to herself through poor life choices (and apparently continues to pork up without remorse). Lifestyle choices have consequences, and the consequences of obesity are well-known.