waterloo road - why did mika and chlo's mum get stabbed again?

[ADDICTEDtosayingHAAAAAAAPYxmas]

was it cos she got the police on that burger/drugs van thing?

Bloke from burger van went to stab Rimmer the head in the school car park cos he had been giving them grief. Izzy saw and got in the way and ended up getting stabbed herself.

ah i thought it was something like that. i have the worst memory ever!