Is Isabella really dead?
Who did it?

If this is not some sort of scheme on her(Isabella's) part, I'd have to say that Paul's meddling mom did it. She hated Isabella, and there was no love lost between her and Christine either, so I don't think she'd have any trouble framing her for the murder! It looks like she drugged Christine before she killed Isabella, so Christine would black out and wouldn't know if she killed her or not.
Of course, that might be just what they want us to think.
Myself, I wouldn't care if Christine did do it, because then they could write her out of the script. I never really liked her anyway! I mean, I can't believe that she was Jabot's top model in the first place. She isn't(and wasn't ever) very pretty, IMO! There were plenty of women on TY&TR who were prettier than her who would've been better cast as models.
But, back to the subject. Who do you think did Isabella in? If that is what happened.