It doesn't seem like she actually knows about that, I feel like the Duke lied to his son about that for some reason LOL
The marriage was just a lie made by his father to get ML to come to the palace.
ML is not the type to 1 step back 2 step forward like his father.
So even though the emperor summoned ML, ML still doesn't want to come.
Father don't want to aggravate the emperor, so he sent that letter lying about Robel getting married to get ML to come back to the capital.
Yeaa I kinda figured that was the case.. Heh
Hahahahaha he's a genius!
7 years? That's a lot, and marriage?