It would be worse if you were the photographer or if it was your sister or mom or something. I'm sure someone else got pictures of her. And plus your camera should have told you when it was about to die. So its your own fault. And also what was she outside? She entered the room not the church!
The same happened to me! I was on a christmas party and my mum assigned me to do the shooting! They were realy good pictures but when "Santa" came my camera died! My mom still reminds me of that day when i start shooting!