Women's tears don't quite melt my heart the way they do for you guys... I think it's a biological thing (show me a man brought to tears by emotion and it rends my heart). BUT... if she MEANS them, if she shows any real emotion aside from anger? Then she becomes a bit more interesting as a character to me (rather than just interesting as a plot force).
It'll take a lot of convincing from me that they'd be real, and moreover, that Wanda wasn't just sad that she's lost a treasured plaything and the joy toying with it brought her. Basically, I want to see Wanda showing some concern for something that isn't, ultimately, Wanda. And if she truly feels ANYthing for Jillian, she can start convincing me by showing some honest remorse for horribly abusing a fellow human being, much less someone she (hypothetically) purportedly cared about.
I'm open to changing my mind, but Wanda's got to do a lot of changing, first.