I would almost guarantee that she lured the mother to her house to kill her to get back at the ex-boyfriend. Perhaps she took a liking to the Muslim Jihadist or Mexican drug cartel tactics!
Excerpts from Wichita Eagle – “Rachael Hilyard – charged with first-degree murder in the April 9 decapitation of 63-year-old Micki Davis [….] The day of the killing, Hilyard contacted Davis and said she was putting her son’s property by the curb if it wasn’t retrieved, police said in an affidavit filed with the court.