Yes, that's exactly what happened, she also thought Ruby is cheating with her brother so she was confident back there that they will saw something else, ao her reaction is also a surprise to her, definitely not helping the situation get better, but it Unexpectedly helped them a lot
I don't think Freya wanted to help Ruby in chapters 103-104. I think she wanted Izek and Ellen to “see” that Ruby had betrayed them. And they didn't!