Martha told me about the anti - toxin and that it was risky , but that he was dead without it . I gave the okay as your second . When it did n't work , I sat there holding his hand imagining a world without him and a world where I had to tell you he was gone and I could n't . I knew you would n't survive that emotionally .

What may be the reason for okaying something so risky ?
The risk was worth the survival .