I read the story at the link. According to it, she wasn’t fired:
“Nike in a statement said Hebert had made the decision to resign.”
Of course, under corporate speak, it could mean that they gave her an option to resign, or some much worse alternative.
It is unlikely she did not know what he was doing since it was her credit card financing the transaction which thereby conveyed her tacit approval and involvement which would then have at least the appearance of being based on insider knowledge. Nike cannot afford to play favorites in its distribution channels.
The credit card left no room for plausible denaibility. I am sympathetic though, who doesn’t want to help out their kid if they can? But who wants an exec who is so clumsy at concealment?