Maybe EP hasn't done anything nefarious, and is thinking "What the heck happened?!"
At this stage we don't know what else was consumed at the lunch, or even if the lunch meal was the cause.
Presumably other food was consumed by the victims on that day.
I'm still far from convinced that she had motive to murder her in-laws. She had been able to move forward from the separation and establish her independence successfully. What would she really have to gain?
IMO there are others who had far stronger motive than she could possibly have.
Something which really strikes me when reading the posts is the comment which she states was made to her by
SP - "is that how you poisoned them?" Please hear me out here. I realise that he would have been distraught about his parents. Nevertheless, that is an unconscionable comment to make to EP IN FRONT OF THEIR CHILDREN. That comment IMO could deeply traumatise them, maybe for the rest of their lives. (I imagine the children could corroborate the statement if necessary.)
I have started to wonder whether EP had found herself in a quite abusive (verbally at least) and emotionally horrible marriage, which had prompted her to separate. I also wonder if her demeanour indicates low self-esteem, and a historical experience of being blamed for things which occur, whatever they may be.
I also am not convinced that SP's illness was necessarily related to ingestion of death cap mushrooms. There may have been some other cause entirely.
I have also wondered whether that illness may have been self-inflicted, and gone awry, with much more serious consequences than expected.
JMO MOO