Hi,
It does not matter if her family members don't have passports. You'll need to post more details
1. Does she have children? If yes, are they minors/adults + what do they do?
2. Does she live with any other family members?
3. Does she own property/land (legally transferred to her name)? Does she earn rental income from the property?
4. Does she have financial investments? Bank term deposits, shares, jewelry, pension funds, etc?
5. What is the purpose of her visit?
6. Has she traveled to the US, UK, Schengen countries, Australia/NZ, etc?
7. Does she have any finances/bank balance of her own? Instead of you (host), can one of her immediate family member support her visit financially?
Cheers