Mistake is not a big deal but how your react on it that's important. We people make mistake and make it big issue. Why we can't forget that mistake and forgive that person? I know few mistakes are unforgivable and unforgettable but we can accept that and move on with person or with situation that we have to decide. But don't make it hard for the person how made mistake. Don't make them more guilty that they take a step to end their life. But just sit with them and explain why is it not good, make them understand the cause of the mistake.