Leave Ending question regarding Laura in SH2

i tried searching online but couldn’t find anything about this specific question i have

so after James watches the “tape”, Laura comes into the room and asks James where Mary is at. after a short back and forth, he confesses that he killed Mary. she reacts with anger and sadness, hitting him, saying she hates him and then runs off.

why, a few hours later, would she willingly leave Silent Hill with James? even before that, she spent the whole game antagonizing him and making it known that she didn’t like him. this to me makes the Leave ending pure fan service and the devs just rewarding people with a “happy” ending after hours of nothing but misery and despair.

maybe i’ve forgotten something that makes it add up but i’m not sure. i would like for this to be cleared up! it’s basically my only “issue” with the game lol