@SpecialProjectY :
Oh geez, that's a bit ago. I don't remember everything about that, but I know she good ntr'ed by the Demonking and loves every inch about it. For the rest, take it with a grain of salt. Also it is based on the LN:
I believe she tricked her guards, but I can't remember the train of events anymore. (it was too much of a minor side plot.) I believe she was captured once before and that was when she got trained into a sexslave. Then she got "saved"/bought back and was returned to her husband side, which must have bored the shit out of her, as she communicated another honeymoon trip with the Demonking and betrayed her own guards to be captured. This way it looked legit, that she got captured again, and the elvenkingdom can be blackmailed again.