The problem with that one is they are both clear dealbreakers, so not a super fun hypothetical. I mean not worth deep thinking on which is worse when result of both is exactly the same (we are breaking up/divorcing).
So for the sake of respecting your game, I'd say I'd prefer she was doing the OF. If the goal was to stay with her, I'd actually prefer the escorting, as at least in that scenario she was being selfless and "doing it for the team" vs. hoarding the money in a secret account for herself.
But since we're breaking up either way, I'd prefer not finding out she's been with a ton of other dudes.