This chapter is pretty much made just to say, "Noru is best husband and that he alone deserves Emma" but the reality is, everything could've been avoided had Emma's parents told Noru right away that the phantom thief wanted to steal Emma. That would allow Noru to form strategies or prepare skills to deal with the issue.
But no, they wanted to tell him after the party, when the deed was already done. It's like they actually want Emma to be taken away. And this chapter showed that they cared more about Noru than their own daughter. What the hell, author?