Ferrid's manga / #Contract(2)

The villainess chooses the life of exile after being reincarnated knowing the stories contents. In the cold winter lands, she summons a demon to light a fire only to find out that its a lifelong contract and the demon is super hot and op.

I'm at ch 7 and I'm still confused? Is it a curse? Does the duke actually like her? What happened after the magic orb broke? They explain it after ch 7 but are you seriously gonna tell me that the MC is gonna run away due to a misunderstanding the ML forgot to mention?