I mean, keep in mind this was 8 years ago.
Not sure why they had them printed out - could have been to review them, could have been for intimidation.
IIRC they asked her why she had changed her FB location to the American city she would stay in for the next 3 months, asked a bunch of questions about past posts in the US talking about helping build our home, buy decorations, etc (all as proof she was intent on overstaying her visa, which was vaguely ridiculous as we had applied for a fiance visa at that point, so she was pretty clearly intending on living here, but we were also pretty clearly intending on going through the legal visa process)
Also asked a bunch of questions about some posts she had made seeking design clients in the US as proof she was working here illegally (even though she owned her own design business and paid taxes on it in Europe, obviously are allowed to take on US clients, but they were sketched out that she was soliciting US clients while in the US)
They questioned her for about an hour with no access to phone/lawyer/etc and gave her the option of immediately voluntarily leaving the US. At the end of the process they told her that it would be the last time she could enter the US on an ESTA and next time it would have to be on the fiance visa, they also told her verbally she had to leave within 14 days, but they still stamped her for a 3 month entry as per regular ESTA guidelines.
--
It was mostly a bunch of silliness about work/residency/intent to work without a work permit/intent to stay in the US without a visa even though all things were aboveboard. The most concerning to me remains that her facebook at the time was not in any legal name, certainly not the name the passenger manifest, but she was still obviously tracked down