Questions Worth Asking
Family
"How involved is your family in day-to-day decisions?"
This tells you how closely you would eventually be building a life with her parents and siblings, not just with her.
Work
"What does your career look like five years from now?"
Her answer signals whether she expects the relationship to adapt around her work, or the reverse.
Relocation
"Could you picture eventually living somewhere else?"
Raise this before either of you gets emotionally attached to one specific outcome.
Timeline
"What pace feels right to you for a relationship like this?"
Pace differs person to person - let her set part of the answer instead of assuming yours applies.