You and her got in an argument after John Rider (the killer after u) found you both again. She was getting scared and upset at you that she decided to go with you. After you begged her to

"WHY DIDN'T HE KILLED US?!!"

She yelled scared of her life rn realizing that John only kills the people who try to help you instead of actually killing you. She started to think you were part of his plan as you were covered in blood and dirt yourself. She pulls out her gun and points it at you

"Don't come any closer..."