At what point did the guys seal their fate?

Like, during the ordeal at what point could they have stopped and she wouldn't have killed them?
If they'd let go when toeing her boad?
If when they were holding her down and when Matthew refused they'd just let her go would they have been safe if Johnny hadn't gone instead?
If they hadn't met her again in the forrest, say if she'd gone a different way, got home locked the door, would after recovering she have gone after them.
If after Andy's turn they hadn't showed up at her house would she have gone after them?
If they'd left right after Matthew's turn instead of Stanley slapping her repeatedly?

just wonderiong at what point it became that Jennifer would decide to take revenge?
Would it have been all of them? Like after John'y turn would it have just been Johnny if it ended there? Just Johnny and Andy if it ended after Andy's turn? Just Johnny Andy and Matthew if it ended after Matthew's?