A once upon a time friend of mine, a Rabbi in fact, once told me, after my Dad passed away, that when our first parent dies, we are brought face-to-face with our own mortality.
When the second parent passes, we become an orphan. It does not matter how many siblings, wives, children, whatever you have, you are still an orphan, and you have to confront that reality.
Benny, my heart goes out to you, Brother. Hang tough, be at peace, and know that God has called him home.