Why some women don't take any action against their husband despite from getting support from family?

This is the story of my paternal aunt. She has been a victim of domestic violence for many years, yet she refuses to take any action against her husband. To be honest, he is an abusive man who also mistreats my cousin sister. He has a short temper, a double face, and never shows his true behaviour in front of others—he only behaves this way in private. He is also a narcissistic husband and father.

If someone thinks she has no family support, they are completely wrong. My entire family has stood by her, guided her, and tried to convince her to leave him. We have even offered her a place to live in the house given to her by my grandfather, along with every kind of support. But despite all this, she still refuses to leave him.she is not even grew up in this kind of environment where women are treated badly. My grandfather was the complete opposite—he was the best husband I have ever seen. He respected my grandmother despite their large age gap and always helped with household work. Seeing that, it is even more painful that my aunt still believes her abusive husband is “great” just because he earns money.

All of us are trying our best to make her understand her worth, but she behaves as if her husband is some kind of god simply because he provides financially. How can we help her realize the truth?