Quinn?

Quinn had started acting weird after finishing her dairy, and would act weird if Elizabeth wanted to touch it.. or read it Which got her suspicious of what was in the diary

Luke was playing with her and had eventually gotten her to sleep and put her to bed to find pictures of Quinn's family in the dairy, the picture had a dad a mum and of course Quinn but the mother was pregnant, so perhaps Quinn had a little brother or sister, they didn't want to talk or question her because she would know that they had been through the dairy, But normally whenever Craig would threaten to take away the dairy Quinn wouldn't flinch and would act like it wasn't important

which that didn't seem to be the case one of the dairy enteries read,

Dearest Dairy, 2016 November 8th

my name is Quinn Maxwell and whoever gets this dairy please take care of it. I was born in California with my mummy and daddy I am 7 years old! I'm nearly eight I'm being held hostage in a darkly lit room it is scary in here luckily I kept the dairy in my rucksack there's a boy! maybe 2 they look like twins one is named Darwin and the other is named Jacobe

they are older than me but I don't know who they actually are

Dearest dairy, 2016 November 10th

My name is Quinn Maxwell Darwin is dead this F*CKER!! CRAIG IS A MONSTER!! F*CK THEY GOT JACOBE NO PLEASE NOT ME STOP STOP!! SOMEONE HELP ME HELP ME HELP ME HELP ME HELP ME HELP ME HELP ME HELP ME HELP ME HELP!

Elizabeth and Lukas looked down at the dairy in shock knowing how much pain she must of felt and is feeling currently.

They had to question Quinn they had no choice

when waking up she was bombarded with questions about the dairy