How did it all go wrong for Krystle after season two?
Just watched the "rose" scene in 2.04 - Krystle's ability to stand up for herself is epic! And her telling off Alexis in a proper way - yes, yes, yes!!!!!!

Krystle's frustration when Alexis milks Steven's accident to the full extent of her patience is perfect... and shows Krystle as the classy person she is.
