I guess we will find out here in a little while but since the episode has a little girl playing the part of Snow in it, I wonder if perhaps Snow as a little girl unintentially revealed that the EQ had a relationship with the Stable Boy. Like maybe she didn’t even understand what was going on but maybe said something about seeing her with the Stable Boy or mentioned that she spends a lot of time in the stables or something. Something that an innocent child wouldn’t even recognize as revealing a secret because she would be too young to recognize that it was a secret, or didn’t understand that she said something that revealed the secret because she was too young to understand something. That would explain why Snow kind of matter-of-factly answered “yes” when James (or was it the Huntsman??) asked her if she really did ruin the queen’s life. So technically she DID ruin the queen’s life if she was the one who brought attention to the fact that EQ was in love with the Stable Boy if that led to his death. But if she was only a child and didn’t do it intentionally, that makes for an interesting twist. If it happened when she was a child she must not have known about it until later because after EQ killed Snow’s father Snow seemed to trust the EQ and the EQ was pretending to love Snow.