She did not know. She did not believe him. How often are families massacred by their own son/brother/nephew ?
She knew nothing of Jeremy's idea to rob his own family until Jeremy arrived there. Then told her to wait outside.
Susan Battersby's 1984 minor cheque book fraud was brought up in court by the defence. Jeremy would have told them about it.
Adam
She in her own words on the night of the murder lay in bed and KNEW that he had done it. then in the next few days she made statements defending him and went to the morgue to see the victims.
Now personally I don't believe her statements and the ONLY excuse that I can think of for her making up all the statements was that the police CONVINCED her that they had a piece of evidence that proved he was guilty and that her "stories" would be the icing on the cake.
Because if she was telling the truth she was guilty of the Minimum charge of perverting the course of justice - result jail
And if she was telling lies , coached by EP then they put her in an extremely difficult position as her stories had to be very hard hitting and built up over a period of time which put her involvement at the forefront of her evidence . No wonder she was so upset when giving evidence . In theory she was in a lose lose situation.