She should be facing charges over starting the whole incident and letting it carry on.
It is arguable that his use of the knife was disproportionate and unlawful, and if she pulled a knife because of that, then she can argue she acted in self-defense. Alternatively, if she drew the knife before the altercation between Simon and Alba, then Alba's claim of self-defense actually improves.
She should be facing charges over starting the whole incident and letting it carry on.
It is arguable that his use of the knife was disproportionate and unlawful, and if she pulled a knife because of that, then she can argue she acted in self-defense. Alternatively, if she drew the knife before the altercation between Simon and Alba, then Alba's claim of self-defense actually improves.