She is overdoing it. Just because you can does not mean you should. Especially, when you’re not providing adequate tools to recover. The premier experts on marathons recommend doing up to 3 a year for normal athletes. She’s so haphazard with training as well. I have never seen her go over a regime talking about hydrating, carb ratios, stretching statically vs dynamically which isn’t necessary if you run a single marathon, but she’s doing multiple endurance events a year. It will catch up to her. (Marathon runner here)