
I'm agreed with yours.
But in my assumtion, maybe his investigation got some disturbance like corset's uncle made it just like what Keira told to the duke, "that she is her mother fruit of affair?", they made the evident allegedly to her mother just like that?,
And, i don't know. If the duke gotten drugged from Corset just like in the Empress that drugged from Duke Frez, so the empress got easily manipulated??
Or the Duke just like how scum Sovieshtu is look like?
Or maybe the Duke just blind?? Coz his memorise and love still in the first Duchess Ruwena? And he never liked her mother maybe?
You knew? When someone still love her/his ex, they will more easily got irritated and will see what the current spouse is not good enough just like the ex? And they will try to make a difference between them?
Is the father that dumb?? He is with her the whole time (like maybe same house) and he believed on a stranger... Like hello??? Is investigation not a thing??... Dumbest grand duke right here