I felt a bit depressed though. I was hoping that Emma escaped from the O.N.E. It makes me sad knowing she has a device in her head that could take her powers away permanently or kill her. Emma has certainly been playing a desperation game. She can't outright betray Callahan because he won't just kill her, he will kill the rest of her Hellfire Club and the X-Men. I wonder how many of the HFC are actually free of explosives in their bodies. Probably Mystique, I expect she may be Emma's only free agent that is able to act without drawing any attention to herself.
If Mystique has been a free agent the whole time, Callahan may not be as ahead of the game as he thinks, if Mystique was free to act it's possible the cure was already compromised by the HFC or they are in the process of destroying the cure or making it inert and useless.
Emma also didn't tell Callahan that Scott has Dark Beast and Hope, she let Scott keep them, so she obviously held out hope that Scott would be able to use the extra science and power his team.
I expect Kwannon unlocked Logan's memories of Emma.