Confused about specific fridging problems
After numerous rounds of advice, I'm learning that one of the problems with fridging is that the woman's (specifically love interest's) death CANNOT be SOLELY to motivate the MMC. Also, if the wife/gf's death can be replaced with a dog, then rewrite; then, if she were to survive and it doesn't fundamentally change the story, then rewrite.
I'm running into these problems: in a story specifically about grief---which I feel is fair to write about---the woman therefore cannot survive, otherwise it is not a story about grief anymore, and in the same vein fundamentally has to be a motivation for the MMC.
Now, this is what I've ensured for my own dead wife character: she actively tries to fight her own death and has goals if she were to survive that are cut short due to the fact that she does not (making it a tragedy); the MMC also does not try to "save" her in any way that she does not approve of, therefore giving utmost agency; the community is affected by her loss, not in a plot-driven way, but in a wide-spread mournfulness that does affect people's individual lives that is shown on-page; her presence, while not physical, permeates the remainder of the story and she is not left on the page that she died on.
My question then becomes: despite all of these precautions, is she still rendered "fridged" because her death serves as the main plot motivation for MMC? Because it is a wife and not a husband, father, brother, does this make her automatically fridged? - (For the sake of word count, I cannot describe every detail why it matters that she is the wife in this instance, but let us assume that the context is there for the sake of discussion)