My girlfriend and I are both German. I've recently been to the US for an internship (3 months). She would have liked to come with me and work remotely for her German employer, but it was our understanding that this would not be allowed. So instead, she just flew over at the end for a short joint holiday.
While in the US, I met someone who was in exactly the same situation, but their girlfriend did accompany them. And at the border, they apparently directly told the agent that he would be working for the American company, while she'd continue working remotely for her German company. They were permitted to enter the US.
Did I misunderstand the US visa requirements? Is there a visa my girlfriend would be eligible for? Or were they lucky and we should not plan on doing the same in the future?