Both of the Winchester brothers arrived in time to save Grace from both killing herself and getting killed by the ghost of John as well. Sam held her in his arms while Dean use his shot gun to the ghost version of John. No use for that.
"Sammy…run" he tells his brother. Sam let go of Grace and grabbed her arm to run out the door and Dean right behind the two. The three quickly ran downstairs and out the door. Grace was starting to breathe heavenly. She couldn't keep up with the two and her plan also backout as well.
Both brother stood there quietly and staring at her. When they heard about the case they thought no one wouldn't be there in the house at all. The two thought it was going to be empty.
Grace just stood there having her arms folded across from her chest and shaking from all of it "H-how…why did you guys come in?" she asked shaking from all of it now. New Mexico day was over and yet here she was alive still and Jim dead and two unknown strangers came in and saved her from getting killed from John ghost and herself.
Sam and Dean looked at each other before answering her question. "It kind've our job to save people from those kind" Sam says as she looked at the two. Saved? She didn't wanna be saved from anything. All Grace wanted to was to kill herself so she didn't feel pain anymore.
In her world it was upside down and that was the world she didn't want to live in anymore. Grace went inside the back seat of the impala while the brothers looked at each other confused before back at her now. She stared at them. "If you need help with this place then let me help you then" she said to the two of them.