In the LN the king and queen aren't so lovey dovey or in sync. In LN both seem determined to ruin and loathe each other you'd think they'd be holding daggers behind their backs and sinister smiles. Also, king decided on own to send MC out to die and spread rumors blaming queen for their son being magic ally lacking. Queen didn't argue or have any motherly concerns and was just coldly plotting. That and before meeting MC Frey killed the soldiers who abandoned him.