I’m so sorry for you, your sister and your brother’s wife. And everyone else that loved him. I know what it feels like. Its real ugly. Especially when it happens so fast. A shock. Nobody got a chance to talk to him and say good by.
But maybe for him and everyone else fast is better than a multi year decline. No stress, anxiety, pain suffering etc waiting to die. My nurse friend Maria told me she’s not afraid of dying, just wants to go fast when the time comes.
Watching someone you care about suffering, like being tortured is extremely bad. My wife wanted me to put her down, with all the pain killers, I understood, and if it was legal I would have done it.