You don't know that either. That she is "only doing logistic work" is also an assumption on your part.
first of all, I do use "as for as I know", which means it is my personally opinion, I do have extra info, well this is not important. the important part is nobody is certain what role Nathan's mom is playing in his training, thus we cannot jump on Nathan's mom just because Raf's Russian interview's one-side story.
and, I will say it again, from all the info I can gather Nathan's mom is mostly doing logistic work in Nathan's figure skating.