I can write any kind of ending because I can tell myself, "It's only fanfic and only an AU," which means I get to go as cruel as I'd like. :D If I couldn't tell myself that, though, I'd wuss out terribly!

(And maybe one day I'll have the courage to kill off Sebastian in a fanfic. That's a place I still haven't been able to go. I know I could if the right idea came along, but it's just so dreadful for me even to contemplate.)