This ability could have had an influence on her move to the dark side, whether she could see into Grindelwald’s mind or if it was simply toying with her brain to an unmanageable point.
Second, Queenie also has the talent of legilimency, which is the ability to see in someone else’s mind.
While it looks like Queenie has gone off the deep end with her allegiance with Grindelwald, there are a couple things to keep in mind.
First off, it was strongly established in the sequel that he has quite the knack for persuasion, so she could just be a victim of circumstance.