Is there someone that will fill my Mom's gas tank on her home if she can't afford it?

The Low Income Home Energy Assistance Program (LIHEAP) provides winter heating, energy crisis, summer cooling and/or weatherization and other energy-related home repair assistance to eligible low-income households throughout each year during specific application periods. 1-866-411-1877 in Oklahoma.

Sunny's right - she needs to contact the fuel supplier ASAP and ask for low income assistance.

I assume she's not getting any assistance from your step father? If they're going to divorce and she has no income beyond SS, she can ask for alimony. That should be put on the front burner as divorce proceedings don't go through court on a rapid basis, especially if the parties contest each other's position.

Has she applied for financial assistance with her local social services agency? There are some funds available for energy costs for low income and disabled. I would inquire. She might also inquire about other housing that might cost less on fuel, food benefits, free phone, etc.