Thanks for the translation!
Interesting fortune teller. I don't think she's a fraud, although it seems she's been peering into the abyss a bit too much and lost her common sense much less her social skills. Just guessing but likely MC and Archduke will marry each other. For starters considering how they feel about each other at the moment both would certainly fulfill the roles offered by the fortune teller. As for crown any sane person wouldn't want it considering all the paperwork, things to keep track of, always having to be careful of actions to avoid giving impression favoring someone aren't or anything the idiots observing could deliberately misinterpret, and never being able to go anywhere without guards because some nutcase wants to kill you just because are royalty or to make it easier for their home country to invade or something. Could be Elpasa crown, the new unified country's crown, or a crown in some other country but will have to wait and see how things develop to find out. Although a crown somewhere else would explain why Archduke would leave the empire although she didn't say how long he'd be gone so after leaving he could return after a few months or years assuming he wants to return. As for his mother loving the Archduke despite threatening him could be several reasons. Such as caring for him but not wanting him to be haunted with caring for her so did something colossally stupid to make him hate her while completely forgetting that doing so usually ends up hurting person saving more and making them twisted or monsters. That his mother was really his stepmother who was unable to have kids, like barely surviving a poisoning attempt resulting in becoming barren, and Archduke is the product of his father and a mistress, servant, or someone whose presence was very well concealed and also happened to have a daughter as well. Probably won't find out more until some time after Marquis' and Gilbert's rebellion is exposed and dealt with.