I listen silently as Jenny talks.

She was in English when someone told her about Eden. Her teacher let her go and she was in the Year Nines toilets when she furiously called Eden.

"I had half a box of paracetamol with me," she explains. "I asked a few people if they had any. They all told me to just keep it. Freya in my year and then Laura and Edie in yours?"

I feel sick. I can just imagine Edie handing over the box with a comforting smile, maybe a hug and telling her that it would get better.

"So I took the pills out of the foil things in the bathroom and put them into this pot from the dining hall. You know, the ones for salad?"

I nod.

"I went to the Food Tech classroom next and I found a bottle of peanut oil that someone had brought in for a practical because I remembered Mr Granger telling us once that he was allergic. So then it was my voluntary session in the afternoon. You remember those, right?"

I do. Each Year Nine teaching group had to miss a chunk of their Week Two Wednesday afternoons to plan an event for the old folks home down the road. We'd done a 1920s theme, Chantelle and I had danced to some snappy song with short wigs and shorter skirts.

"Of course I do. But why the peanut oil?"

"I did some research in the toilets. The painkillers wouldn't be enough to kill him, it would take a week or it wouldn't work and I couldn't take that chance. So I took the peanut oil."

"Oh my God."

"So basically, Mr Granger was in one of the classrooms near the hall with Miss Daley. They both came in to watch Hallie do her gymnastics routine and I asked them if they wanted a coffee."

"You didn't," I whisper. "Jenny..."

"And nobody saw me because the drinks cart was kind of pushed away from everything and everyone was watching Hallie. So nobody saw me put a load of pills into Granger's coffee. Like all of them. Then I poured in all the peanut oil too- I'd stolen the whole bottle an because all the containers in the bag were empty so it must've been a morning lesson and the bottle was pretty much full."

"Oh my God," I say once again because what else can I fucking say?

"That's not even-"

"-Here's your food," the guy from the counter says. "Enjoy." He sets the tray down with my burrito and Jenny's sides and walks away.

"The worst part," Jenny finishes. "The worst part is that he said thank you and told me he'd drink it later. I forgot to say but he asked me to make it in his flask so it wouldn't get cold."

The thought of Jenny in her Dugray uniform mixing paracetamol and peanut oil into Mr Granger's extra string coffee makes me sick. She has to be kidding. This has to be some sick joke. Sure Eden might've told her about our plan for me to poison Mr Granger's coffee, but she would never do it. Let alone in her lunch break, gathering drugs and oil in between her gossip session and actually eating her lunch.

"I even made the coffee extra strong so he wouldn't be able to tell there were drugs or peanut oil in it." She's properly crying now. "God, I'm such an awful person. Who fucking does that?"

"Why did you do it?" I whisper even though it's a stupid question.

"Because Eden." She gulps. "Eden said when I called her that the only reason she killed Josh is so you could kill Granger. And then she... then she said do you want him to have died for nothing and I was like no and I went and I got painkillers from my friends and stole peanut oil from someone and I fucking killed my History teacher, oh my fucking God."

For some reason, I unwrap my barbecue sizzler and take a bite. Maybe it's to avoid talking to her, to buy myself a few more seconds to figure out what the hell I'm going to do.

"Why did you tell me?" Why the hell did you drag me into murder too? First Eden tried and now you did so successfully.

"Because I'm going bloody insane. I don't get how Eden kept it in. I killed someone, Eve. And I can't tell my parents because they're buying Josh's coffin today- his fucking coffin, Eve. And I can't tell my friends because they'll think I'm insane. And you're the only one who'll listen to me."

She's properly crying now and the family is staring at us.

"Tissue?" I extract a mini packet of them out of my bag. "Don't cry, Jen."

"I don't know what I was thinking. Overdosing my teacher? I could've just left it, but no. I just had to go into school late and kill him. I am actually insane."

"Jenny-"

"- I'm going to go to prison. And oh my God, my parents will actually die. First Josh being murdered and then me turning into a murderer. What am I going to do?"

I consider telling her to pray they rule it as suicide. There's a rumour that he'd been kicked out that morning because of the affair and it kind of makes sense. That he's try to overdose and consume his deathly allergy just in case it didn't work. But that kind of makes me just as bad. Not even kind of. It does make me as bad.

"It's eating me alive, Eve." The tears trickle down her cheeks. "And my parents, this will kill them. They're planning Josh's funeral, they're doing everything possible to make sure I'm okay and I go and bloody kill my teacher. I just can't do this anymore."

"Then you know what you have to do."