My step-dad had a heart attack

He's doing OK, but still it's a freakin' heart attack!!! He's 86 years old and has pneumonia in his left lung. He has been as much of a father figure to me as my own dad. Heck, he probably had more to do with bringing me up than my dad b/c I lived with him 12 out of 14 days.
I don't want to think about the worst. I want my kids to have their papa. I can't be that pillar of strength that my mom will need. I really need Bud to be OK and get better. I need him to heal so he can spend his summer days in my backyard reading his books and playing with his grandkids. (He never came to my old house, but now that we have the new one this was his favorite thing to do this past summer).