Kind of silly thread, really. You cannot say such a thing – even if you say it now, who says it won’t be different if such a situation would occur?
Personally, I’d prefer in that case for both to die so at least neither will feel bad and we’ll go together.
In my case, it would be my wife obviously, in the future my children (which I don’t have yet), and my cats. Yes, I know some will argue I’m crazy – but so is this thread.