Thanks for listening to a female's point of view. I've always been able to "carry my own", (y'all know I do the restaurant thing, which was mostly cash back in the day)...we never, ever had issues...he made plenty, I followed up. It was just kinda understood.
If you care about her, have the discussion (over a nice bottle of wine wouldn't hurt). 😉
If you don't see her as a life partner, do what you're comfortable with.