Why were the girls so fixated on Honora Parker?
It seems Juliet's parents were the one who aggressively wanted for the girls to end their relationship and Mrs. Hulme really dropped the ball when she had the affair and divorced her husband, which would send Juliet away to South Africa. By all logic (twisted and macabre logic, but logic nonetheless), the Juliet and Pauline should've gone after Juliet's mother, yet the two decided to kill Pauline's mother. Why did they single out her? All four of the parents were against the relationship, the Hulmes actually more so than the Parker/Riepers. Is it because Honora was the weakest, hence the easier target?
"...When they found her, she was still smiling."