i denied her to keep Kirby around. I'll most likely do another run with her leaving.
Viewing post in Did anyone encounter Mrs. Kimura on the farm?
Talk to Mrs. Kimura and ask her to wait. Then you can go home to find Joseph. He will suggest you split the money 5:5. Finally, go to the hotel in the city center to find Mrs. Kimura and tell her you want a 5:5 split. Mrs. Kimura will agree to your suggestion, and Kirby will not leave. You ask Kirby about her friend, and he will take you to the shack to trigger the extra CG.