@yasyas what she has in her mind is the novel plot, where she get executed after he become king, so at least rather than killed, she could get divorced, right? that's what on her mind. get his heart (not as lover, but as friend, as she frequently repeated) as the guy never agreed to this marriage and never said he love her. she didn't realize that her action already change the plot.
does she in love with him? at this point, no, not that she aware of, at least.
does he love her? yes, but she didn't know. what she know from the plot that he will married another girl
does she manipulate him? yes she is. for her own safety. but she don't aware consequence of her action.