For a few months, while I was taking Accutane, my earwax turned dry and flaky. It was awesome. It would come out much more easily, it wouldn't accumulate, and for once my ears stopped producing so much liquid. But I imagine depending on your unique body, it could make things quite a bit worse if you manage to get an earwax blockage.
Disclaimer: do not take Accutane for more than a few months, unless your doctor really knows what they're doing. Apparently there are significant risks associated with long-term usage.
And pure speculation, but I imagine if you're not excreting that fat, you might lose a tiny bit less weight when exercising?
Maybe she's used to it. Maybe it's not that bad to her. Or maybe she just thinks it's impolite to point it out.
Maybe you're right and you really don't smell much. But most cases I've seen actually did smell.