Loads of people are seeming to say she had a valid point, so her behaviour was okay? No- if she had a problem with John and Tiffany, she could have discussed it in a calmer, more rational way. Not when she was drunk, obviously, but later. Her behaviour was awful.
I mean, I loved it as a TV viewer because it was television gold, but she's made herself look like a nutter and made John look like a calm voice of reason. Which is exactly what she said he was doing, playing 'Mr Innocent', so if she really believes that, she's played right into his hands? Idiot.