Personally, I don't care how many people he cheats with as long as he keeps pumping the stock and they're consenting adults. The only person hurt in this situation is the wife, which is not me.

However, the main problem here is that he was knowingly selling GPUs to a woman who was then selling them to China. This is where he would not be fulfilling his fiduciary duty as now the company will be coming under fire for violating ITAR.