Her enhance durability can only last so long. Victory's enhanced durability acts like a 4th layer of skin. It's fed by the bio energy her body produces at an unmeasurable rate. Her body in theory can stop the most destructive of weapons, but she does not have full control of her powers. In RPG term she has a power incontinents issue. The weaker she becomes the more her enhanced durability fails. So yes, initially an inferno like this would be nothing to her ... until her system is taxed, the moment it faulters, it's a downward spiral she cannot stop.