Haha, I will not hate Sima PingTing even if she kills SiuYiu. I like this character too much. I seldom hate villains. I don't hate Eunuch Cheung either even after all the bad things he did. I only hate annoying characters.
But I have to add. It will be really sad if she did kill her brother. Sima SiuYiu is the closes person to her and if she can kill even him, she really have gone too far in her hatred. There's really no turning back for her anymore.