Mother has seasonal depression

This time of the year my Mother experiences seasonal depression. She will not go to the doctor and doesn’t want my coaching. The result I want to create is to love her AND myself through it all without eating.

Last night, I ate food not on my protocol for the evening. I don’t want to continue this behavior in response to my Mother’s mood. I know it’s in response to my thought. I guess my question is two-fold… would it be helpful to explore my thoughts or to explore experiencing sadness?

I’m not sure I want to change my thought that it’s sad my Mother will not get help but I don’t want to then experience my own holiday season with so much sadness. Then, I have resentment. I know she isn’t causing my sadness. It’s my thoughts but I’m struggling to break this loop.