I'm glad your girlfriend loves herself.
She's being honest with you about unresolved issues with her family. That will be valuable... especially when/if you have children..
Your family or her family?
if you get married, you'll create your own baggage, together, just you and her; tell her to dump all illusions about family baggage and just focus on the two of you now.
Could be she is trying to make sure things are worked out before marriage. Which is actually the best time to do it.